%I #4 Nov 12 2015 06:56:00

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

%N 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.

%C Diagonal of A264364.

%e Some solutions for n=4

%e ..7..8..9..1..2....0..8..9..3..4....0..8..9..1..4....0..1..9..3..4

%e ..0..6..5..3..4...12..1..2..6..7....5..6..2..3..7....5..6..2..8..7

%e .17.11.10.13.12....5.18.19.11.14...17.11.10.13.12...17.18.10.11.14

%e .15.16.24.18.14...10.16.15.13.17...15.23.24.18.14...22.16.12.13.19

%e .20.21.22.23.19...20.21.22.23.24...20.16.22.21.19...15.21.20.23.24

%Y Cf. A264364.

%K nonn

%O 1,2

%A _R. H. Hardin_, Nov 12 2015