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Number of (n+1) X (n+1) 0..6 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 7 (constant-stress 1 X 1 tilings).
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%I #6 Jun 20 2022 21:28:19

%S 112,1120,5968,40144,184144,1062832,4632208,24862768,106979152,

%T 553292080,2391038608

%N Number of (n+1) X (n+1) 0..6 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 7 (constant-stress 1 X 1 tilings).

%e Some solutions for n=4:

%e 6 1 4 0 5 0 5 0 6 3 5 2 5 3 6 4 2 4 2 5

%e 4 6 2 5 3 2 0 2 1 5 1 5 1 6 2 1 6 1 6 2

%e 6 1 4 0 5 0 5 0 6 3 5 2 5 3 6 3 1 3 1 4

%e 4 6 2 5 3 3 1 3 2 6 0 4 0 5 1 1 6 1 6 2

%e 6 1 4 0 5 0 5 0 6 3 5 2 5 3 6 3 1 3 1 4

%Y Diagonal of A235319.

%K nonn

%O 1,1

%A _R. H. Hardin_, Jan 05 2014