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%I #6 Jun 19 2022 02:32:21
%S 70,546,2390,11982,42982,187686,635654,2614518,8740870,34959606,
%T 117588230,464375382,1585487302
%N Number of (n+1) X (n+1) 0..4 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 4 (constant-stress 1 X 1 tilings).
%e Some solutions for n=5:
%e 0 4 1 4 2 4 2 1 3 1 2 2 1 0 2 0 2 0 0 4 0 4 0 2
%e 1 1 2 1 3 1 0 3 1 3 0 4 0 3 1 3 1 3 3 3 3 3 3 1
%e 0 4 1 4 2 4 3 2 4 2 3 3 1 0 2 0 2 0 0 4 0 4 0 2
%e 0 0 1 0 2 0 0 3 1 3 0 4 1 4 2 4 2 4 4 4 4 4 4 2
%e 0 4 1 4 2 4 1 0 2 0 1 1 3 2 4 2 4 2 0 4 0 4 0 2
%e 2 2 3 2 4 2 0 3 1 3 0 4 0 3 1 3 1 3 3 3 3 3 3 1
%Y Diagonal of A234564.
%K nonn
%O 1,1
%A _R. H. Hardin_, Dec 28 2013
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