A264279 Number of (n+1)X(n+1) arrays of permutations of 0..(n+1)^2-1 with each element having directed index change 0,0 0,1 1,0 or -1,-2.

1, 10, 132, 4484, 537057, 157344756, 126311779972, 290106175842629, 1813081182779342345

Offset

1,2

Comments

Diagonal of A264285.

Links

Table of n, a(n) for n=1..9.

Example

Some solutions for n=4
..0..1..9..2..3....7..0..9..2..4....7..1..9..2..4....7..0..1..2..4
..5.13..6..7..4....5..1..6..3..8....0..5..6..3..8....5..6.14..3..8
.10.11.12..8.14...17.11.19.12.13...17.10.11.13.14...10.18.11.13..9
.15.23.17.18.19...10.16.24.18.14...22.15.12.18.19...15.16.12.17.19
.20.16.21.22.24...15.20.21.22.23...20.16.21.23.24...20.21.22.23.24

Crossrefs

Cf. A264285.

Sequence in context: A286723 A239814 A166771 * A296637 A223407 A203325

Adjacent sequences: A264276 A264277 A264278 * A264280 A264281 A264282

Keyword

nonn

Author

R. H. Hardin, Nov 10 2015

Status

approved