cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

Showing 1-10 of 12 results. Next

A264280 Number of (n+1) X (3+1) arrays of permutations of 0..n*4+3 with each element having directed index change 0,0 0,1 1,0 or -1,-2.

Original entry on oeis.org

8, 32, 132, 556, 2324, 9724, 40692, 170268, 712468, 2981244, 12474676, 52198876, 218420308, 913955132, 3824342132, 16002528156, 66960773524, 280189801724, 1172422611892, 4905870136668, 20528060064468, 85897351187644
Offset: 1

Views

Author

R. H. Hardin, Nov 10 2015

Keywords

Examples

			Some solutions for n=4:
..0..1..2..3....0..1..2..3....6..0..1..3....0..7..2..3....0..1..2..3
..4.11..5..6....4.11..6..7....4.11..2..7....4..1..5..6....4..5..6..7
..8..9.10..7...14..5..9.10...14..5..9.10....8.15..9.11....8..9.10.11
.12.19.14.15....8.19.13.15....8.19.13.15...18.13.10.14...12.19.13.14
.16.13.17.18...12.16.17.18...12.16.17.18...12.16.17.19...16.17.18.15
		

Crossrefs

Column 3 of A264285.

Formula

Empirical: a(n) = 3*a(n-1) +4*a(n-2) +4*a(n-3).
Empirical g.f.: 4*x*(2 + 2*x + x^2) / (1 - 3*x - 4*x^2 - 4*x^3). - Colin Barker, Jan 07 2019

A264281 Number of (n+1) X (4+1) arrays of permutations of 0..n*5+4 with each element having directed index change 0,0 0,1 1,0 or -1,-2.

Original entry on oeis.org

16, 102, 675, 4484, 29742, 197283, 1308629, 8680430, 57579243, 381936079, 2533467942, 16805062848, 111471762753, 739417281750, 4904721187204, 32534119120513, 215806131795839, 1431490625216236, 9495399380127733
Offset: 1

Views

Author

R. H. Hardin, Nov 10 2015

Keywords

Examples

			Some solutions for n=4:
..7..1..9..2..4....0..1..2..3..4....0..8..1..2..4....0..1..2..3..4
..0..6.14..3..8...12.13..6..7..9...12..6..7..3..9....5..6.14..7..9
..5.10.11.12.13....5.18.11..8.14....5.10.11.13.14...10.11.12..8.13
.22.16.24.17.18...10.15.16.17.19...15.16.24.18.19...22.16.24.17.18
.15.20.21.23.19...20.21.22.23.24...20.21.17.22.23...15.20.21.23.19
		

Crossrefs

Column 4 of A264285.

Formula

Empirical: a(n) = 7*a(n-1) - 2*a(n-2) - 2*a(n-3) - 6*a(n-4) + a(n-5) + 3*a(n-6).
Empirical g.f.: x*(16 - 10*x - 7*x^2 - 5*x^3 + 4*x^4 + 3*x^5) / ((1 - x)*(1 - 6*x - 4*x^2 - 2*x^3 + 4*x^4 + 3*x^5)). - Colin Barker, Jan 07 2019

A264282 Number of (n+1)X(5+1) arrays of permutations of 0..n*6+5 with each element having directed index change 0,0 0,1 1,0 or -1,-2.

Original entry on oeis.org

33, 360, 4189, 47492, 537057, 6080234, 68815948, 778858184, 8815152033, 99770013733, 1129198689933, 12780289656956, 144647529389761, 1637123130312800, 18528986663178389, 209711377463378556
Offset: 1

Views

Author

R. H. Hardin, Nov 10 2015

Keywords

Comments

Column 5 of A264285.

Examples

			Some solutions for n=4
..0..1..2.11..3..5....0..1..2..3..4..5....8..0..1.11..3..4....8..0..1.11..3..5
.14.15..7..8..4.10....6..7.16..8..9.10....6..7..2.17..9..5....6..7..2..9..4.10
..6.12.13..9.16.17...12.13.14.23.15.11...12.21.14.15.10.16...12.13.14.15.16.17
.26.19.28.20.21.23...18.27.19.21.22.17...26.13.19.20.22.23...18.27.19.21.22.23
.18.24.25.27.22.29...24.25.20.26.28.29...18.24.25.27.28.29...24.25.20.26.28.29
		

Crossrefs

Cf. A264285.

Formula

Empirical: a(n) = 13*a(n-1) -21*a(n-2) +41*a(n-3) -240*a(n-4) +363*a(n-5) -713*a(n-6) +1511*a(n-7) -1901*a(n-8) +3908*a(n-9) -2154*a(n-10) -2194*a(n-11) +13330*a(n-12) -23182*a(n-13) +22684*a(n-14) -11790*a(n-15) -5098*a(n-16) +19906*a(n-17) -28138*a(n-18) +26916*a(n-19) -18981*a(n-20) +10893*a(n-21) -5677*a(n-22) +2813*a(n-23) -1228*a(n-24) +419*a(n-25) -101*a(n-26) +15*a(n-27) -a(n-28)

A264283 Number of (n+1)X(6+1) arrays of permutations of 0..n*7+6 with each element having directed index change 0,0 0,1 1,0 or -1,-2.

Original entry on oeis.org

69, 1228, 23852, 448821, 8405669, 157344756, 2943284092, 55051679668, 1029653214581, 19257696830753, 360177074785951, 6736389525457738, 125990593920680631, 2356399915372788509, 44071705305977748721
Offset: 1

Views

Author

R. H. Hardin, Nov 10 2015

Keywords

Comments

Column 6 of A264285.

Examples

			Some solutions for n=3
..0..1..2..3.13..4..6....0..1.11..2..3..4..5....9..1..2.12..4..5..6
.16..8..9.10.11..5.12...16..8..9.10.20.12..6....0..7.18..3.10.11.13
..7.14.15.26.17.19.20....7.24.15.26.17.18.13...14..8.15.26.17.19.20
.21.22.23.24.18.25.27...14.21.22.23.25.19.27...21.22.16.23.24.25.27
		

Crossrefs

Cf. A264285.

Formula

Empirical: a(n) = 21*a(n-1) -35*a(n-2) -24*a(n-3) -2418*a(n-4) +1222*a(n-5) +1666*a(n-6) +75369*a(n-7) +39969*a(n-8) +248500*a(n-9) +598695*a(n-10) +216997*a(n-11) +1075367*a(n-12) -6591199*a(n-13) +4139667*a(n-14) -9785301*a(n-15) -12360890*a(n-16) +1932484*a(n-17) -7781630*a(n-18) +149081924*a(n-19) -138365444*a(n-20) +24141639*a(n-21) -11812497*a(n-22) +7948563*a(n-23) +433802*a(n-24) +3921508*a(n-25) -27876300*a(n-26) +20972668*a(n-27) +14393531*a(n-28) -25372299*a(n-29) +12929562*a(n-30) -751221*a(n-31) -1759401*a(n-32) +272403*a(n-33) +152361*a(n-34) -15309*a(n-35) -6561*a(n-36)

A264284 Number of (n+1)X(7+1) arrays of permutations of 0..n*8+7 with each element having directed index change 0,0 0,1 1,0 or -1,-2.

Original entry on oeis.org

145, 4156, 134432, 4227024, 131452948, 4076914388, 126311779972, 3911932445892, 121136137544916, 3750881659750212, 116140758199404916, 3596108918102565732, 111347352849488575188, 3447676814806342897540, 106751270110819359767412
Offset: 1

Views

Author

R. H. Hardin, Nov 10 2015

Keywords

Comments

Column 7 of A264285.

Examples

			Some solutions for n=3
..0..1..2..3.14..5..6..7....0..1.12.13..4.15..5..6....0.11..2..3.14.15..5..6
..8..9.10.11..4.12.13.15....8..9..2..3.11.23.14..7....8..1..9.10..4.12.13..7
.16.27.17.19.20.31.21.22...26.17.10.18.19.20.21.22...16.27.17.19.20.21.22.23
.24.25.18.26.28.29.30.23...16.24.25.27.28.29.30.31...24.25.18.26.28.29.30.31
		

Crossrefs

Cf. A264285.

Formula

Empirical: a(n) = 37*a(n-1) -148*a(n-2) -648*a(n-3) -18812*a(n-4) +33720*a(n-5) +341320*a(n-6) +3490528*a(n-7) +2721200*a(n-8) -13811392*a(n-9) -95460256*a(n-10) -173488256*a(n-11) -318028224*a(n-12) -1470212608*a(n-13) +840492032*a(n-14) +14620982784*a(n-15) +49650196480*a(n-16) +50819317760*a(n-17) +88642775040*a(n-18) +235467870208*a(n-19) -222393663488*a(n-20) -1393025925120*a(n-21) -2983768571904*a(n-22) -30476926976*a(n-23) +5734697598976*a(n-24) +5710659846144*a(n-25) -2268499279872*a(n-26) -7922359730176*a(n-27) -3287065559040*a(n-28) +6731216191488*a(n-29) +5292339232768*a(n-30) -5224022409216*a(n-31) -6274678784000*a(n-32) -950261514240*a(n-33) +676457349120*a(n-34)

A264286 Number of (2+1)X(n+1) arrays of permutations of 0..n*3+2 with each element having directed index change 0,0 0,1 1,0 or -1,-2.

Original entry on oeis.org

1, 10, 32, 102, 360, 1228, 4156, 14148, 48188, 163956, 557884, 1898612, 6461148, 21987412, 74824380, 254631924, 866526236, 2948835860, 10035051900, 34149835828, 116213772252, 395481874772, 1345846631740, 4579990298484
Offset: 1

Views

Author

R. H. Hardin, Nov 10 2015

Keywords

Comments

Row 2 of A264285.

Examples

			Some solutions for n=4
..7..0..1..2..3....7..0..1..2..3....0..8..1..3..4....7..0..1..2..4
..5.13.14..8..4...12..5.14..8..4....5..6..2..7..9....5..6.14..3..9
.10..6.11.12..9...10..6.11.13..9...10.11.12.13.14...10.11.12..8.13
		

Crossrefs

Cf. A264285.

Formula

Empirical: a(n) = a(n-1) +4*a(n-2) +10*a(n-3) +12*a(n-4) +8*a(n-5) for n>7.
Empirical g.f.: x*(1 + x)*(1 + 8*x + 10*x^2 + 10*x^3 + 8*x^4 + 4*x^5) / (1 - x - 4*x^2 - 10*x^3 - 12*x^4 - 8*x^5). - Colin Barker, Oct 28 2017

A264287 Number of (3+1)X(n+1) arrays of permutations of 0..n*4+3 with each element having directed index change 0,0 0,1 1,0 or -1,-2.

Original entry on oeis.org

1, 26, 132, 675, 4189, 23852, 134432, 768664, 4381032, 24926476, 141860756, 807487003, 4595740788, 26154580810, 148850346356, 847132073037, 4821138523341, 27437703642929, 156151443585980, 888677485184057
Offset: 1

Views

Author

R. H. Hardin, Nov 10 2015

Keywords

Comments

Row 3 of A264285.

Examples

			Some solutions for n=4
..0..8..2..3..4....0..1..9..2..3....7..0..9..2..4....7..0..1..2..3
.12..1..6..7..9....5..6.14..7..4...12..1..6..3..8....5..6.14..8..4
..5.10.19.13.14...17.11.12..8.13....5.11.19.13.14...10.18.11.13..9
.15.11.16.17.18...10.15.16.18.19...10.15.16.17.18...15.16.12.17.19
		

Crossrefs

Cf. A264285.

Formula

Empirical: a(n) = 4*a(n-1) +49*a(n-3) +28*a(n-4) +151*a(n-5) -422*a(n-6) -440*a(n-7) -4951*a(n-8) -5034*a(n-9) -21236*a(n-10) -10830*a(n-11) -35531*a(n-12) +70252*a(n-13) +98222*a(n-14) +598559*a(n-15) +862584*a(n-16) +2273649*a(n-17) +3303360*a(n-18) +5397292*a(n-19) +8239675*a(n-20) +8783560*a(n-21) +15078516*a(n-22) +9441060*a(n-23) +18503539*a(n-24) +7507100*a(n-25) +13363728*a(n-26) +2382501*a(n-27) -2382501*a(n-29) -13363728*a(n-30) -7507100*a(n-31) -18503539*a(n-32) -9441060*a(n-33) -15078516*a(n-34) -8783560*a(n-35) -8239675*a(n-36) -5397292*a(n-37) -3303360*a(n-38) -2273649*a(n-39) -862584*a(n-40) -598559*a(n-41) -98222*a(n-42) -70252*a(n-43) +35531*a(n-44) +10830*a(n-45) +21236*a(n-46) +5034*a(n-47) +4951*a(n-48) +440*a(n-49) +422*a(n-50) -151*a(n-51) -28*a(n-52) -49*a(n-53) -4*a(n-55) +a(n-56)

A264288 Number of (4+1)X(n+1) arrays of permutations of 0..n*5+4 with each element having directed index change 0,0 0,1 1,0 or -1,-2.

Original entry on oeis.org

1, 69, 556, 4484, 47492, 448821, 4227024, 40561798, 385401502, 3654429812, 34690006705, 329163589542, 3121764930650, 29603292090987, 280717647093650, 2661785027200918, 25238274365506684, 239298584328248763
Offset: 1

Views

Author

R. H. Hardin, Nov 10 2015

Keywords

Comments

Row 4 of A264285.

Examples

			Some solutions for n=4
..0..1..2..3..4....0..1..9..2..3....7..1..9..2..3....0..1..9..2..4
..5.13..6..7..9...12..6..7..8..4....0..5..6..8..4....5..6..7..3..8
.17.10.12..8.14....5.10.11.13.14...10.18.11.12.14...17.10.11.12.14
.15.11.16.18.19...15.23.16.17.19...22.15.16.13.19...22.23.16.13.19
.20.21.22.23.24...20.21.22.18.24...20.21.17.23.24...15.20.21.18.24
		

Crossrefs

Cf. A264285.

A264289 Number of (5+1)X(n+1) arrays of permutations of 0..n*6+5 with each element having directed index change 0,0 0,1 1,0 or -1,-2.

Original entry on oeis.org

1, 181, 2324, 29742, 537057, 8405669, 131452948, 2106493053, 33373652045, 527999350819, 8361101819256, 132229311039965, 2089823448380709, 33022907786733950, 521708203665257621, 8240560035947933736
Offset: 1

Views

Author

R. H. Hardin, Nov 10 2015

Keywords

Comments

Row 5 of A264285.

Examples

			Some solutions for n=4
..7..0..1..3..4....7..0..1..2..4....7..0..2..3..4....0..1..2..3..4
..5..6..2..8..9...12..5..6..3..9....5..1..6..8..9....5..6..7..8..9
.10.18.11.12.14...10.11.19..8.14...10.11.19.12.14...17.10.11.12.14
.15.23.16.13.19...15.16.17.13.18...15.16.17.13.18...15.16.24.13.19
.27.21.17.22.24...27.20.21.23.24...20.21.29.22.24...27.20.22.18.23
.20.25.26.28.29...25.26.22.28.29...25.26.27.23.28...25.21.26.28.29
		

Crossrefs

Cf. A264285.

A264290 Number of (6+1)X(n+1) arrays of permutations of 0..n*7+6 with each element having directed index change 0,0 0,1 1,0 or -1,-2.

Original entry on oeis.org

1, 476, 9724, 197283, 6080234, 157344756, 4076914388, 108938582132, 2873909666826, 75778281689996, 2000675174765756, 52737323325950072, 1389226958546893740, 36583604627425625924, 962973302936002433384
Offset: 1

Views

Author

R. H. Hardin, Nov 10 2015

Keywords

Comments

Row 6 of A264285.

Examples

			Some solutions for n=4
..7..0..2..3..4....7..1..2..3..4....0..1..9..2..3....0..1..9..2..3
.12..1..6..8..9....0..5..6..8..9...12..5..6..8..4...12..6.14..7..4
..5.10.11.13.14...17.10.19.12.13...10.11..7.13.14....5.10.11..8.13
.15.16.24.18.19...15.11.16.18.14...22.15.16.17.19...15.16.24.18.19
.20.21.17.22.23...27.20.21.22.23...27.21.29.18.24...20.21.17.22.23
.32.26.27.28.29...32.26.34.28.24...20.25.26.23.28...25.26.34.28.29
.25.30.31.33.34...25.30.31.33.29...30.31.32.33.34...30.31.27.32.33
		

Crossrefs

Cf. A264285.
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