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%I #6 Apr 05 2020 21:33:38
%S 0,4,14,52,206,772,2896,10996,41862,159836,612572,2354880,9076852,
%T 35073264,135823868,527012084,2048410070,7974173484,31085538148,
%U 121332433984,474123211448,1854631573500,7261693567782,28457603057044
%N Number of n X 2 0..1 arrays with the number of 1's horizontally or vertically adjacent to some 0 one less than the number of 0's adjacent to some 1.
%C Column 2 of A284771.
%H R. H. Hardin, <a href="/A284765/b284765.txt">Table of n, a(n) for n = 1..210</a>
%e Some solutions for n=4
%e ..0..1. .0..0. .0..1. .0..0. .0..1. .1..0. .1..0. .1..0. .1..1. .0..1
%e ..0..0. .0..0. .0..0. .1..0. .1..0. .1..0. .0..1. .0..1. .0..0. .0..0
%e ..0..0. .0..1. .1..0. .0..0. .1..0. .0..0. .0..0. .1..0. .0..0. .0..1
%e ..1..1. .1..0. .1..1. .1..1. .0..0. .1..0. .0..1. .0..0. .0..1. .1..0
%Y Cf. A284771.
%K nonn
%O 1,2
%A _R. H. Hardin_, Apr 02 2017
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