A264358 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 0,2 1,0 or -1,-2.

1, 6, 169, 7168, 831744, 353333680, 450847788304, 1591640798421348

Offset: 1

Author

R. H. Hardin, Nov 12 2015

Keywords

• nonn

Comments

Diagonal of A264364.

Examples

			Some solutions for n=4
..7..8..9..1..2....0..8..9..3..4....0..8..9..1..4....0..1..9..3..4
..0..6..5..3..4...12..1..2..6..7....5..6..2..3..7....5..6..2..8..7
.17.11.10.13.12....5.18.19.11.14...17.11.10.13.12...17.18.10.11.14
.15.16.24.18.14...10.16.15.13.17...15.23.24.18.14...22.16.12.13.19
.20.21.22.23.19...20.21.22.23.24...20.16.22.21.19...15.21.20.23.24
		

Crossrefs

Cf. A264364.