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%I #6 Apr 05 2020 22:42:00
%S 2,6,19,62,212,751,2719,10002,37258,140108,530646,2021127,7733421,
%T 29702087,114438213,442099674,1711885120,6642102554,25817134600,
%U 100506778916,391827603432,1529486575678,5977159139018,23382840951503
%N Number of n X 2 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 Column 2 of A284222.
%H R. H. Hardin, <a href="/A284216/b284216.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. .0..0. .0..0. .0..1. .0..0. .0..1
%e ..0..1. .0..0. .1..1. .0..0. .1..0. .1..1. .1..1. .0..1. .1..1. .1..1
%e ..1..1. .0..1. .0..0. .0..0. .1..0. .1..0. .0..0. .0..1. .1..1. .1..0
%e ..1..0. .1..0. .1..1. .0..1. .0..1. .0..1. .1..1. .0..1. .1..1. .0..1
%Y Cf. A284222.
%K nonn
%O 1,1
%A _R. H. Hardin_, Mar 23 2017
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