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%I #6 Jun 19 2022 02:23:39
%S 80,3296,287888,53812604,21167182224,17748461638244,31177141022942176,
%T 116792004877640829552
%N Number of (n+1) X (n+1) 0..3 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 1 (constant-stress 1 X 1 tilings).
%e Some solutions for n=2:
%e 0 2 3 2 0 0 1 3 2 2 2 2 3 3 2 2 3 2 3 2 1
%e 0 1 3 1 0 1 0 3 3 2 3 2 2 1 1 1 3 1 3 3 1
%e 0 0 3 0 0 0 1 3 2 3 3 1 3 1 2 0 3 0 3 2 1
%Y Diagonal of A234333.
%K nonn
%O 1,1
%A _R. H. Hardin_, Dec 23 2013
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