%I #6 Apr 05 2020 23:41:40
%S 0,1,53,486,4091,32070,246852,1897509,14578434,112390406,867693603,
%T 6716080364,52061270779,404329966577,3144612848086,24493415901992,
%U 191015933608631,1491484435347360,11658153191250672,91217811828544156
%N Number of 3 X n 0..1 arrays with the number of 1's horizontally or antidiagonally adjacent to some 0 two less than the number of 0's adjacent to some 1.
%C Row 3 of A293087.
%H R. H. Hardin, <a href="/A293089/b293089.txt">Table of n, a(n) for n = 1..210</a>
%e Some solutions for n=4
%e ..0..0..0..0. .0..0..1..0. .0..1..0..0. .0..0..0..0. .0..1..0..0
%e ..1..0..1..0. .0..1..0..1. .0..1..0..0. .0..1..1..0. .0..1..1..0
%e ..0..1..1..0. .1..0..0..0. .0..1..1..1. .1..0..1..0. .1..0..1..0
%Y Cf. A293087.
%K nonn
%O 1,3
%A _R. H. Hardin_, Sep 30 2017
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