A264335 Number of (n+1)X(7+1) arrays of permutations of 0..n*8+7 with each element having directed index change -1,1 1,0 1,-1 or 0,-1.

4, 64, 1573, 51904, 1371555, 40119900, 1082465413, 28865247648, 765329377660, 20139599598080, 528526363260915, 13854017612924940, 362859602388291635, 9499873105298368189, 248666260777963610898, 6508400337721660839232

Offset

1,1

Comments

Column 7 of A264336.

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

Some solutions for n=4
..1..8..3..4.11..6.13.14....1..8..3.10..5.12.13.14....1..8..3..4.11..6.13.14
..0..2.17.18.19..5.15..7....0.16..2..4.19..6.21..7....0.16..2.18.19..5.21..7
..9.10.25.20.12.22.29.30....9.18.11.26.27.28.29.15....9.10.25.20.12.22.15.30
.16.32.33.34.35.21.37.23...17.32.33.34.20.22.23.38...17.32.33.34.35.36.37.23
.24.26.27.36.28.38.39.31...24.25.35.36.37.30.39.31...24.26.27.28.29.38.39.31

Crossrefs

Cf. A264336.

Sequence in context: A371661 A352275 A146341 * A091483 A263988 A208357

Adjacent sequences: A264332 A264333 A264334 * A264336 A264337 A264338

Keyword

nonn

Author

R. H. Hardin, Nov 11 2015

Status

approved