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%I #6 Apr 05 2020 23:15:09
%S 0,56,786,11574,159060,2284666,33371602,495256266,7426444716,
%T 112236717358,1706444466326,26070175620594,399870502837122,
%U 6153779131538066,94972379110894900,1469319459956729810
%N Number of 4 X n 0..1 arrays with the number of 1's horizontally or antidiagonally adjacent to some 0 one less than the number of 0's adjacent to some 1.
%C Row 4 of A285152.
%H R. H. Hardin, <a href="/A285155/b285155.txt">Table of n, a(n) for n = 1..176</a>
%e Some solutions for n=4
%e ..1..0..0..1. .0..0..1..0. .0..0..1..0. .1..1..0..1. .0..0..1..1
%e ..0..1..0..1. .0..1..0..1. .0..0..0..0. .0..0..1..0. .0..0..1..1
%e ..0..1..1..1. .0..1..0..0. .1..0..1..1. .0..0..1..1. .0..0..1..0
%e ..0..0..0..0. .1..1..0..1. .1..0..0..1. .0..0..1..1. .0..0..1..1
%Y Cf. A285152.
%K nonn
%O 1,2
%A _R. H. Hardin_, Apr 12 2017
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