A264330 Number of (n+1)X(n+1) arrays of permutations of 0..(n+1)^2-1 with each element having directed index change -1,1 1,0 1,-1 or 0,-1.

0, 2, 11, 240, 15040, 2464988, 1082465413, 1305850666324, 4313697610977647, 38861959267954227472, 960516137799542036574195

Offset

1,2

Comments

Diagonal of A264336.

Links

Table of n, a(n) for n=1..11.

Example

Some solutions for n=4
..1..5..3..7..8....1..5..3..7..8....1..5..3..4..8....1..2..6..4..8
..0..2.11.12..4....0..2.11.12..4....0..7..2.12.13....0.10..3..9.13
..6.15.13.14..9....6.15.16..9.18...11..6.16..9.18....5.15..7.17.18
.10.20.21.22.23...10.20.13.14.23...10.20.21.14.23...11.20.12.22.14
.16.17.18.24.19...21.22.17.24.19...15.22.17.24.19...21.16.23.24.19

Crossrefs

Cf. A264336.

Sequence in context: A269710 A162385 A244012 * A343898 A134096 A132571

Adjacent sequences: A264327 A264328 A264329 * A264331 A264332 A264333

Keyword

nonn

Author

R. H. Hardin, Nov 11 2015

Status

approved