A264378 Number of (n+1)X(7+1) arrays of permutations of 0..n*8+7 with each element having directed index change 2,-2 -1,0 -1,2 1,0 or 0,-1.

25, 544, 88264, 9407584, 1187897216, 135926940964, 16353452350876, 1906883090233889, 225710195773223581, 26480802739477668891, 3118944367808136172136, 366509498887083495949171

Offset

1,1

Comments

Column 7 of A264379.

Links

R. H. Hardin, Table of n, a(n) for n = 1..38

Example

Some solutions for n=3
..8..9.10..4..5..6.12.13....8..2..3..9.10..6.14.13....8..2..3..4.10.11..7.15
..0..1..2..3.18.14.20.21....0..1.11.12..4..5.15..7....0..1.16.19.18..5.22.21
.24.25.26.11.28..7.30.31...24.25.26.20.28.27.30.31...17..9.24.20..6.27.28.29
.16.17.27.19.29.15.22.23...16.17.18.19.29.21.22.23...25.26.12.13.14.30.31.23

Crossrefs

Cf. A264379.

Sequence in context: A122140 A083191 A226299 * A015679 A230454 A014909

Adjacent sequences: A264375 A264376 A264377 * A264379 A264380 A264381

Keyword

nonn

Author

R. H. Hardin, Nov 12 2015

Status

approved