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%I #6 Nov 10 2015 10:55:02
%S 1,8,324,32400,12960000,34260048000,431336822822500
%N Number of (n+1)X(n+1) arrays of permutations of 0..(n+1)^2-1 with each element having index change +-(.,.) 0,0 1,2 or 2,-2.
%C Diagonal of A264059.
%e Some solutions for n=4
%e ..0..1..2.11.12....0..8..9..3..4....0..8.10..3.12....0..1..2.11..4
%e ..5..6.14..8..9....5..6.15..1..2....5..6.14..1..2....5..6.15.16..9
%e .17..3..4.13.22...17.11.19.13.14...17.11..4.13..7...10..3.19.21..7
%e ..7.23.10.18.19....7.23.10.18.12...22.16..9.18.19...22..8.24.18.12
%e .20.21.15.16.24...20.21.22.16.24...20.21.15.23.24...20.13.14.23.17
%Y Cf. A264059.
%K nonn
%O 1,2
%A _R. H. Hardin_, Nov 02 2015