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 10 results.

A264417 Number of (n+1)X(2+1) arrays of permutations of 0..n*3+2 with each element having directed index change 0,1 2,2 1,0 -1,2 -2,-1 or -1,-1.

Original entry on oeis.org

2, 3, 20, 85, 351, 1462, 6021, 25188, 104870, 437164, 1821829, 7592125, 31637827, 131836355, 549380672, 2289347792, 9540065618, 39754914509, 165664757540, 690350003398, 2876792156808, 11988025615109, 49955906989734
Offset: 1

Views

Author

R. H. Hardin, Nov 12 2015

Keywords

Comments

Column 2 of A264422.

Examples

			Some solutions for n=4
..4..5..1....4..5..1....4..5..3....4..5..3....4..5..1....4..5..1....4..8..1
..0..8..2....0..8..2...10..1..2....0..1..2....7..8..2....0..8..2....0.11..2
..3..6..7....3.11..7...13.14..0...10.11..7...10.11..0...10..6..7...10.14..5
.13.14.12....6.14.12....6..7..8...13.14..8....6.14..3...13.14..3....6..7..3
..9.10.11....9.10.13....9.12.11....9.12..6....9.12.13....9.12.11....9.12.13
		

Crossrefs

Cf. A264422.

Formula

Empirical: a(n) = 3*a(n-1) +a(n-2) +7*a(n-3) +29*a(n-4) +13*a(n-5) +64*a(n-6) +161*a(n-7) -12*a(n-8) +82*a(n-9) -257*a(n-10) -1288*a(n-11) -1368*a(n-12) -2536*a(n-13) -3049*a(n-14) -516*a(n-15) -4280*a(n-16) -1979*a(n-17) +1117*a(n-18) +1724*a(n-19) +10832*a(n-20) +12414*a(n-21) -146*a(n-22) +13134*a(n-23) +10828*a(n-24) -6040*a(n-25) +4027*a(n-26) -4916*a(n-27) -23812*a(n-28) -5121*a(n-29) +3663*a(n-30) -6131*a(n-31) -1747*a(n-32) -1254*a(n-33) +1643*a(n-34) -722*a(n-35) -905*a(n-36) +386*a(n-37) +72*a(n-38) -695*a(n-39) -249*a(n-40) +334*a(n-41) +108*a(n-42) -44*a(n-43) +64*a(n-44) +149*a(n-45) -10*a(n-46) +36*a(n-47) +29*a(n-48) +46*a(n-49) -2*a(n-50) -8*a(n-51) +4*a(n-52) +5*a(n-53) +2*a(n-54) +a(n-55) +a(n-56)

A264418 Number of (n+1)X(3+1) arrays of permutations of 0..n*4+3 with each element having directed index change 0,1 2,2 1,0 -1,2 -2,-1 or -1,-1.

Original entry on oeis.org

0, 12, 96, 529, 4843, 44264, 352713, 2840274, 23795758, 197390196, 1619132059, 13345740560, 110326933611, 910298134238, 7505842151352, 61932503872184, 511075503235669, 4216464623838747, 34786555887673881, 287016646384919794
Offset: 1

Views

Author

R. H. Hardin, Nov 12 2015

Keywords

Comments

Column 3 of A264422.

Examples

			Some solutions for n=4
..9..6..1..5....5.10..1..2....5..6..7..2....9..6..7..5....9.10..4..2
.13.10..2..3....0..4.15..3...13..1.15..3....0..1..2..3....0..1..5..3
..4.14..0..7...13.14..6..7....4.14..0.10...13.14.19.10...13.14..6..7
.17.18.19.11....8.18.19.11...17..9.19.11...17.18..4.11....8.18.19.11
.12.16..8.15...12.16.17..9...12.16..8.18...12.16..8.15...12.16.17.15
		

Crossrefs

Cf. A264422.

Formula

Empirical recurrence of order 70 (see link above)

A264419 Number of (n+1)X(4+1) arrays of permutations of 0..n*5+4 with each element having directed index change 0,1 2,2 1,0 -1,2 -2,-1 or -1,-1.

Original entry on oeis.org

0, 37, 499, 7311, 137584, 2486429, 40217261, 681146169, 11846231201, 202674077729, 3440768212887, 58817070295375, 1006675030473401, 17189924020400699, 293506491114760927, 5015242699900223807
Offset: 1

Views

Author

R. H. Hardin, Nov 12 2015

Keywords

Comments

Column 4 of A264422.

Examples

			Some solutions for n=4
.11..0..8..2..3....6..7..8..2..3....6..7..8..9..3...11..0..1..2..3
.16..1.10..7..4....0.12.13.14..4....0..1..2.11..4...16.12.13.14..4
..5..6.23.24..9....5.17.23..1..9...16.17.23.12.13...21..6.23..8..9
.21.22.12.13.14...21.11.20.24.18...21.22..5.24.14...10.22..5.24..7
.15.20.17.18.19...15.16.10.22.19...15.20.10.18.19...15.20.17.18.19
		

Crossrefs

Cf. A264422.

A264420 Number of (n+1)X(5+1) arrays of permutations of 0..n*6+5 with each element having directed index change 0,1 2,2 1,0 -1,2 -2,-1 or -1,-1.

Original entry on oeis.org

4, 119, 2681, 101862, 4023076, 147984724, 5498758183, 201733617932, 7423226389478, 272586759114218, 10017280306174267, 368272005900678107, 13531455789624669204, 497163630139105690695, 18268217310170065817424
Offset: 1

Views

Author

R. H. Hardin, Nov 12 2015

Keywords

Comments

Column 5 of A264422.

Examples

			Some solutions for n=4
..7..8.15.16.17..4....7..8..6.10.17..4....7..0..1.10.11..4....7..0.15.10..3..4
..0.14..2..3..9..5....0..1..2..3.23..5...19.14..2.16.23..5...19.20..2.16.17..5
.19.20.21..1.10.11...19.20.21..9.29.11....6.26..8..9.15..3....6.26.27..1.29.11
.12.13..6.28.29.22...25.26.14.28.16.27...12.13.27.25.29.17...12.13.14.28..8..9
.18.24.25.26.27.23...18.24.12.13.22.15...18.24.20.21.22.28...18.24.25.21.22.23
		

Crossrefs

Cf. A264422.

A264423 Number of (2+1) X (n+1) arrays of permutations of 0..n*3+2 with each element having directed index change 0,1 2,2 1,0 -1,2 -2,-1 or -1,-1.

Original entry on oeis.org

1, 3, 12, 37, 119, 385, 1252, 4061, 13166, 42687, 138419, 448847, 1455443, 4719435, 15303308, 49622768, 160907641, 521761825, 1691873630, 5486097814, 17789312907, 57683924784, 187046863084, 606521298870, 1966716147754, 6377306803896
Offset: 1

Views

Author

R. H. Hardin, Nov 12 2015

Keywords

Examples

			Some solutions for n=4:
..6..7..1..2..3....6..0..1..9..3....6.12.13.14..7...11.12.13..2..3
..0.12.13.14..4...11.12..2.14..4....0..1..2..3..4....0..1..6.14..4
..5.10.11..8..9....5.10..7..8.13....5.10.11..8..9....5.10..7..8..9
		

Crossrefs

Row 2 of A264422.

Formula

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

A264424 Number of (3+1) X (n+1) arrays of permutations of 0..n*4+3 with each element having directed index change 0,1 2,2 1,0 -1,2 -2,-1 or -1,-1.

Original entry on oeis.org

1, 20, 96, 499, 2681, 15088, 86469, 479787, 2666733, 14940857, 83531649, 466766772, 2608467230, 14576309209, 81469725947, 455319456892, 2544569549821, 14220929241086, 79476850018075, 444172492025104, 2482352553030166
Offset: 1

Views

Author

R. H. Hardin, Nov 12 2015

Keywords

Comments

Row 3 of A264422.

Examples

			Some solutions for n=4
.11..0..8..2..3....6..0..8..2..3....6..0..1..9..3...11..7..1..9..3
.16..1.13.14..4...11.12.18.19..4...11.12.18.19..4....0.12.13.19..4
..5.17..7.19..9...16.17..7..1..9....5.17..7..8..2....5.17.18..8..2
.10.15.12..6.18...10.15..5.13.14...10.15.16.13.14...10.15.16..6.14
		

Crossrefs

Cf. A264422.

Formula

Empirical: a(n) = 4*a(n-1) +a(n-2) +50*a(n-3) -47*a(n-4) +214*a(n-5) -752*a(n-6) -111*a(n-7) -426*a(n-8) +2579*a(n-9) +1278*a(n-10) -4700*a(n-11) +19726*a(n-12) -3406*a(n-13) -3587*a(n-14) -55733*a(n-15) -17896*a(n-16) -7934*a(n-17) -4722*a(n-18) -5228*a(n-19) +15420*a(n-20) +47468*a(n-21) +9368*a(n-22) +6264*a(n-23) +6632*a(n-24) +6960*a(n-25) -4912*a(n-26) -13680*a(n-27) +1056*a(n-28) -1184*a(n-29) -1440*a(n-30) -128*a(n-32) +384*a(n-33).

A264425 Number of (4+1)X(n+1) arrays of permutations of 0..n*5+4 with each element having directed index change 0,1 2,2 1,0 -1,2 -2,-1 or -1,-1.

Original entry on oeis.org

1, 85, 529, 7311, 101862, 1103666, 13805196, 169633649, 2021225139, 24679272503, 299292066678, 3620259337857, 43944809107738, 532640833103943, 6455594272133455, 78276807986884628, 948887621876714100
Offset: 1

Views

Author

R. H. Hardin, Nov 12 2015

Keywords

Comments

Row 4 of A264422.

Examples

			Some solutions for n=4
..6..0..1..9..3....6..7..8..2..3....6..7..1..9..3....6.12..1..9..7
.11..5.13..7..4...16.12.13.11..4....0.12.13.19..4....0..5..2..3..4
.16.17.23..8..2....5.17..0..1..9....5.17.18..8..2...16.17.11..8.13
.10.22.12.24.14...10.22.23.24.14...10.11.16.24.14...21.22.23.24.14
.15.20.21.18.19...15.20.21.18.19...15.20.21.22.23...15.20.10.18.19
		

Crossrefs

Cf. A264422.

Formula

Empirical: a(n) = a(n-1) +66*a(n-2) +767*a(n-3) +1772*a(n-4) -5737*a(n-5) -60500*a(n-6) -147478*a(n-7) +248837*a(n-8) +915581*a(n-9) -595548*a(n-10) +1256272*a(n-11) +6424752*a(n-12) +2523024*a(n-13) +20229024*a(n-14) +12822912*a(n-15) -24975872*a(n-16) for n>18

A264426 Number of (5+1)X(n+1) arrays of permutations of 0..n*6+5 with each element having directed index change 0,1 2,2 1,0 -1,2 -2,-1 or -1,-1.

Original entry on oeis.org

1, 351, 4843, 137584, 4023076, 95946259, 2486418295, 64826165535, 1652429011909, 42508454066939, 1094317644738425, 28099100591929747, 722286772733295541, 18567899507526341784, 477183716427656944275, 12264894190427166009575
Offset: 1

Views

Author

R. H. Hardin, Nov 12 2015

Keywords

Comments

Row 5 of A264422.

Examples

			Some solutions for n=4
.11.12..8..9..7....6..0..8..9..7....6.12..8..2..3...11..0..8..9..3
..0..1.13..3..4...16..1..2..3..4...11..1.13..7..4...16..1.13..7..4
.16..6.18.24..2....5.22.18.24.13...16.10..0.24..9....5..6.18.12..2
.10.22..5.17.14...10.11.12.17.14...21.15..5.29.14...21.22.28.24.14
.15.27.25.29.19...15.27.21.29.19...26.27.28.18.19...15.27.10.29.19
.20.21.26.23.28...20.25.26.23.28...20.25.22.23.17...20.25.26.23.17
		

Crossrefs

Cf. A264422.

A264421 Number of (n+1)X(6+1) arrays of permutations of 0..n*7+6 with each element having directed index change 0,1 2,2 1,0 -1,2 -2,-1 or -1,-1.

Original entry on oeis.org

0, 385, 15088, 1103666, 95946259, 7577203142, 577598946184, 44052069039720
Offset: 1

Views

Author

R. H. Hardin, Nov 12 2015

Keywords

Comments

Column 6 of A264422.

Examples

			Some solutions for n=3
.15..9..7..2.12..4..5....8..9.10.11.12..4..5....8..9..1.18.12..4..5
..0..1.17..3.19.20..6....0.16.24..3.19.20..6....0.16..2..3.19.20..6
.22..8.24.25.11.27.13....7.23.21..1..2.27.13....7.23.21.25.11.27.13
.14.21.16.23.18.10.26...14.15.22.17.18.25.26...14.15.22.17.24.10.26
		

Crossrefs

Cf. A264422.

A264427 Number of (6+1)X(n+1) arrays of permutations of 0..n*7+6 with each element having directed index change 0,1 2,2 1,0 -1,2 -2,-1 or -1,-1.

Original entry on oeis.org

3, 1462, 44264, 2486429, 147984724, 7577203142, 396849643846, 20924743041507, 1094394105909728
Offset: 1

Views

Author

R. H. Hardin, Nov 12 2015

Keywords

Comments

Row 6 of A264422.

Examples

			Some solutions for n=3
..9..6.11..5....5..6..1..2....5..6..7..2....9..6..7..2....9..0..7..5
..0..1..2..3....9.10.11..3....9..1.15..3....0..1.11..3...13..1..2..3
..4..8.15..7....4.18..0..7....4.14..0.10....4..5.19.10....4.14..6.10
.21.22.10.14....8.12.19.14...21.22.23.11....8.18.23.14....8.18.23.11
.12.13.17.18...21.13.23.15...12.13..8.18...12.22.27.15...12.22.27.15
.25.26.27.19...25.17.27.22...25.26.27.19...25.17.21.13...25.26.24.19
.20.24.16.23...20.24.16.26...20.24.16.17...20.24.16.26...20.21.16.17
		

Crossrefs

Cf. A264422.
Showing 1-10 of 10 results.