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%I #6 Nov 10 2015 11:00:43
%S 1,9,576,108045,79655625,317072810421,5905008685374120,
%T 472983452271864360000
%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,-1.
%C Diagonal of A264128.
%e Some solutions for n=4
%e ..0..1..5..3..4....0..1..2.12..4....0..1..5.12..4....0.10..5..3.13
%e ..2..6.16.17.18....5..3.10.17..9....2..6.16..8..9....2.15.16.11.12
%e .10.11..9.13.14....7..8.15.22.23...10.20..3.13.17....1..8.21..4.23
%e .15..7..8.21.19....6.16.20.21.19...15..7.14.18.22....6..7.17..9.19
%e .20.12.22.23.24...11.18.13.14.24...11.21.19.23.24...20.18.22.14.24
%Y Cf. A264128.
%K nonn
%O 1,2
%A _R. H. Hardin_, Nov 03 2015
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