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 1-6 of 6 results.

A263592 Number of length n arrays of permutations of 0..n-1 with each element moved by -3 to 3 places and the median of every three consecutive elements nondecreasing.

Original entry on oeis.org

1, 2, 6, 16, 41, 108, 280, 729, 1908, 4969, 12950, 33796, 88112, 229740, 599191, 1562470, 4074372, 10625188, 27707446, 72253034, 188417568, 491341657, 1281284446, 3341248089, 8713071846, 22721332009, 59251115518, 154510913809
Offset: 1

Views

Author

R. H. Hardin, Oct 22 2015

Keywords

Examples

			Some solutions for n=6:
..2....1....0....1....3....0....1....1....1....0....0....2....0....1....0....0
..0....0....1....0....1....1....0....0....0....1....3....0....4....0....1....1
..3....2....5....4....0....3....3....5....2....2....2....4....1....3....2....2
..5....3....2....3....5....5....5....2....4....4....1....3....2....5....4....5
..1....4....3....2....4....4....4....3....5....5....4....1....3....2....3....4
..4....5....4....5....2....2....2....4....3....3....5....5....5....4....5....3
		

Crossrefs

Column 3 of A263597.

Formula

Empirical: a(n) = a(n-1) + a(n-2) + 7*a(n-3) + 2*a(n-4) + 4*a(n-5) - a(n-7) - a(n-8).
Empirical g.f.: x*(1 + x + 3*x^2 + x^3 + 3*x^4 + x^5 - x^6 - x^7) / (1 - x - x^2 - 7*x^3 - 2*x^4 - 4*x^5 + x^7 + x^8). - Colin Barker, Jan 02 2019

A263593 Number of length n arrays of permutations of 0..n-1 with each element moved by -4 to 4 places and the median of every three consecutive elements nondecreasing.

Original entry on oeis.org

1, 2, 6, 16, 52, 164, 476, 1428, 4308, 12816, 38324, 114924, 343696, 1028096, 3077672, 9209704, 27556452, 82465380, 246779888, 738461796, 2209820148, 6612853424, 19788642456, 59216642832, 177203814880, 530275470412, 1586827690308
Offset: 1

Views

Author

R. H. Hardin, Oct 22 2015

Keywords

Comments

Column 4 of A263597.

Examples

			Some solutions for n=6
..2....4....1....1....1....1....1....1....0....0....0....1....0....0....3....4
..1....1....5....0....5....0....0....0....5....4....1....3....1....3....2....0
..3....2....2....2....0....2....2....5....1....1....2....2....3....2....0....1
..4....5....0....3....2....5....3....3....2....2....4....0....5....1....4....3
..0....0....4....4....4....3....5....2....4....3....5....4....2....4....5....5
..5....3....3....5....3....4....4....4....3....5....3....5....4....5....1....2
		

Crossrefs

Cf. A263597.

Formula

Empirical: a(n) = a(n-1) +a(n-2) +12*a(n-3) +5*a(n-4) +7*a(n-5) +2*a(n-6) +17*a(n-7) +31*a(n-8) -9*a(n-9) -14*a(n-10) +10*a(n-11) -22*a(n-12) -4*a(n-13) -4*a(n-15)

A263594 Number of length n arrays of permutations of 0..n-1 with each element moved by -5 to 5 places and the median of every three consecutive elements nondecreasing.

Original entry on oeis.org

1, 2, 6, 16, 52, 208, 676, 2208, 7696, 25508, 83880, 283660, 948060, 3148584, 10557340, 35322344, 117782000, 393897360, 1317263556, 4398977356, 14702092412, 49147888808, 164212896136, 548766913936, 1834139828140, 6129193479188
Offset: 1

Views

Author

R. H. Hardin, Oct 22 2015

Keywords

Comments

Column 5 of A263597.

Examples

			Some solutions for n=6
..1....0....4....1....1....0....4....0....4....2....0....0....5....1....5....4
..5....2....2....5....2....3....0....1....1....1....3....1....0....0....0....2
..2....1....1....0....0....2....2....3....0....0....1....2....2....4....1....1
..0....5....5....2....3....1....3....2....5....4....5....5....4....3....2....3
..3....4....3....4....5....5....1....4....3....5....4....4....1....2....4....5
..4....3....0....3....4....4....5....5....2....3....2....3....3....5....3....0
		

Crossrefs

Cf. A263597.

Formula

Empirical: a(n) = a(n-1) +a(n-2) +19*a(n-3) +7*a(n-4) +13*a(n-5) -3*a(n-6) +31*a(n-7) +71*a(n-8) +205*a(n-9) +389*a(n-10) -185*a(n-11) -235*a(n-12) +388*a(n-13) -368*a(n-14) -145*a(n-15) +1131*a(n-16) +256*a(n-17) -228*a(n-18) +218*a(n-19) -208*a(n-20) -1006*a(n-21) -248*a(n-22) -190*a(n-23) -308*a(n-24) -76*a(n-25) +36*a(n-26) -80*a(n-27) +104*a(n-28) +8*a(n-29) +16*a(n-31)

A263595 Number of length n arrays of permutations of 0..n-1 with each element moved by -6 to 6 places and the median of every three consecutive elements nondecreasing.

Original entry on oeis.org

1, 2, 6, 16, 52, 208, 800, 2900, 10960, 40792, 148288, 544600, 2000084, 7312332, 26795812, 98234356, 359845004, 1319030780, 4834945864, 17718152672, 64944710636, 238041386504, 872396576888, 3197533964256, 11719620057508
Offset: 1

Views

Author

R. H. Hardin, Oct 22 2015

Keywords

Comments

Column 6 of A263597.

Examples

			Some solutions for n=6
..2....4....1....1....5....0....0....4....1....0....2....0....1....1....0....1
..3....0....2....0....0....2....2....0....2....2....5....1....0....0....3....0
..0....1....0....2....1....3....1....1....5....4....0....3....2....5....1....3
..4....3....4....5....3....4....4....5....3....1....3....2....5....2....4....2
..5....2....5....4....2....1....5....3....0....3....4....4....3....3....5....4
..1....5....3....3....4....5....3....2....4....5....1....5....4....4....2....5
		

Crossrefs

Cf. A263597.

Formula

Empirical: a(n) = a(n-1) +a(n-2) +27*a(n-3) +11*a(n-4) +19*a(n-5) -17*a(n-6) +55*a(n-7) +207*a(n-8) +399*a(n-9) +842*a(n-10) +4810*a(n-11) +7064*a(n-12) -5048*a(n-13) -11662*a(n-14) +10885*a(n-15) -23133*a(n-16) -24495*a(n-17) +19889*a(n-18) -61624*a(n-19) -96905*a(n-20) -82792*a(n-21) -121206*a(n-22) -43903*a(n-23) -440813*a(n-24) -321679*a(n-25) +36248*a(n-26) -1481424*a(n-27) -184710*a(n-28) -147760*a(n-29) -954886*a(n-30) -1689620*a(n-31) +910782*a(n-32) -876748*a(n-33) -1449360*a(n-34) +1330892*a(n-35) +2445848*a(n-36) -1219064*a(n-37) +1399100*a(n-38) +2785232*a(n-39) +286256*a(n-40) +544140*a(n-41) +1489220*a(n-42) -40800*a(n-43) -524376*a(n-44) -119768*a(n-45) -395576*a(n-46) +110160*a(n-47) +418424*a(n-48) +649656*a(n-49) -332096*a(n-50) +215424*a(n-51) +84720*a(n-52) -2800*a(n-53) +293600*a(n-54) -3744*a(n-55) +128256*a(n-56) +40704*a(n-57) +10944*a(n-58) +11712*a(n-59) +2176*a(n-60) +9472*a(n-61) -1664*a(n-62) +3840*a(n-63) -2816*a(n-64) -256*a(n-65) -512*a(n-67)

A263596 Number of length n arrays of permutations of 0..n-1 with each element moved by -7 to 7 places and the median of every three consecutive elements nondecreasing.

Original entry on oeis.org

1, 2, 6, 16, 52, 208, 800, 3360, 14024, 55492, 223040, 900728, 3560916, 14099980, 56141676, 222623336, 881949584, 3502057736, 13900013276, 55132695636, 218842222824, 868762179984, 3447429959044, 13682419728976, 54311665765692
Offset: 1

Views

Author

R. H. Hardin, Oct 22 2015

Keywords

Comments

Column 7 of A263597.

Examples

			Some solutions for n=6
..3....1....2....0....1....1....0....0....5....5....1....3....5....0....1....5
..0....0....1....5....2....0....1....1....1....0....0....0....1....1....0....0
..2....3....0....1....3....3....2....3....2....1....4....1....0....3....3....1
..4....4....5....3....4....5....4....5....4....3....2....4....3....2....4....4
..1....2....4....4....5....4....3....2....0....4....3....5....4....5....5....2
..5....5....3....2....0....2....5....4....3....2....5....2....2....4....2....3
		

Crossrefs

Cf. A263597.

A263591 Number of length n arrays of permutations of 0..n-1 with each element moved by -n to n places and the median of every three consecutive elements nondecreasing.

Original entry on oeis.org

1, 2, 6, 16, 52, 208, 800, 3360, 16224, 78088, 393408, 2189872, 12371616, 71835000, 448860480, 2871278464, 18727425440, 129070035784, 913845701344
Offset: 1

Views

Author

R. H. Hardin, Oct 22 2015

Keywords

Comments

Diagonal of A263597.

Examples

			Some solutions for n=6
..0....0....5....4....0....4....4....4....1....5....2....3....1....0....0....4
..1....3....0....2....2....2....1....0....2....2....0....1....2....5....3....1
..2....2....2....0....5....1....0....1....4....1....4....2....0....2....2....0
..3....1....3....5....3....5....2....3....0....3....3....4....3....1....4....5
..4....4....1....3....1....3....3....5....3....4....1....5....4....3....5....2
..5....5....4....1....4....0....5....2....5....0....5....0....5....4....1....3
		

Crossrefs

Cf. A263597.
Showing 1-6 of 6 results.