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%I #6 Apr 05 2020 22:48:03
%S 8,62,467,6511,85887,1214427,17538010,258414316,3854276528,
%T 58011648676,879122723506,13394856893254,204995150323546,
%U 3148797878923546,48517163038369066,749553577633265717,11606806249286351346
%N Number of 4 X n 0..1 arrays with the number of 1's horizontally or antidiagonally adjacent to some 0 equal to the number of 0's adjacent to some 1, with top left element zero.
%C Row 4 of A284222.
%H R. H. Hardin, <a href="/A284225/b284225.txt">Table of n, a(n) for n = 1..176</a>
%e Some solutions for n=4
%e ..0..1..1..1. .0..0..0..1. .0..1..0..0. .0..1..1..1. .0..0..1..1
%e ..1..1..1..0. .0..0..0..1. .1..1..0..1. .1..1..0..0. .1..0..0..0
%e ..0..1..0..0. .0..1..0..1. .0..0..1..1. .1..0..1..0. .0..0..0..0
%e ..1..1..1..0. .0..1..0..1. .1..0..0..1. .1..0..0..0. .1..1..1..1
%Y Cf. A284222.
%K nonn
%O 1,1
%A _R. H. Hardin_, Mar 23 2017
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