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%I #6 Jun 19 2022 02:15:50
%S 220334,765738,2659824,9288710,32545706,114484712,404043442,
%T 1431125914,5084793448,18127421166,64813774926,232475602952,
%U 836155485018,3016451992646,10910475434292,39574863492918,143905533079266
%N Number of (n+1) X (7+1) 0..3 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="/A234489/b234489.txt">Table of n, a(n) for n = 1..34</a>
%e Some solutions for n=1:
%e 0 1 3 2 2 0 2 1 2 3 0 3 3 1 1 3 0 3 0 2 3 1 2 1
%e 1 0 0 1 3 3 3 0 0 3 2 3 1 1 3 3 0 1 0 0 3 3 2 3
%Y Column 7 of A234490.
%K nonn
%O 1,1
%A _R. H. Hardin_, Dec 26 2013
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