A264475 Number of (n+1)X(7+1) arrays of permutations of 0..n*8+7 with each element having directed index change 0,1 1,0 2,1 or -1,-1.

0, 76, 484, 11044, 215607, 4039259, 74367790, 1358980008, 25131223920, 454913826610, 8308148502158, 150817534124764, 2737572458162063, 49698482940927931, 901239835437298103, 16348456871339244625

Offset

1,2

Comments

Column 7 of A264476.

Links

R. H. Hardin, Table of n, a(n) for n = 1..147

Example

Some solutions for n=4
..9..0.11.12..3..4.15..6....9..0..1.12.13.14..5..6....9..0.11.12.13.14.15..6
.17..8..2.10.21..5.13..7...17.18..2..3..4.22.23..7...17..1..2..3..4..5.23..7
.25.26..1.18.19.20.14.22...25.26.10.11.19.20.21.15...25.16.27.18.29.20.31.22
.16.34.35.36.37.38.39.23...16..8.35.36.27.38.39.30...33..8.35.10.37.28.39.30
.24.32.33.27.28.29.30.31...24.32.33.34.28.29.37.31...24.32.26.34.19.36.21.38

Crossrefs

Cf. A264476.

Sequence in context: A238918 A234786 A234779 * A363843 A262790 A184680

Adjacent sequences: A264472 A264473 A264474 * A264476 A264477 A264478

Keyword

nonn

Author

R. H. Hardin, Nov 14 2015

Status

approved