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%I #6 Jun 20 2022 01:27:09
%S 72616,1520024,32965378,725628904,16021165696,354931091338,
%T 7860119921126,174432581257432,3867909998650764,85938055271287920,
%U 1907697414837426570,42433568115687443458,942986024965772638510,20999313840564845514606
%N Number of (n+1) X (3+1) 0..7 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 2 (constant-stress 1 X 1 tilings).
%H R. H. Hardin, <a href="/A234243/b234243.txt">Table of n, a(n) for n = 1..130</a>
%e Some solutions for n=1:
%e 3 5 7 7 4 6 3 2 3 1 0 5 1 3 0 1 5 5 4 7
%e 0 0 0 2 1 1 0 1 6 6 3 6 2 6 1 0 2 4 1 2
%Y Column 3 of A234245.
%K nonn
%O 1,1
%A _R. H. Hardin_, Dec 21 2013
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