%I
%S 2,4,13,34,118,419,1481,5394,19848,73880,277222,1047495,3977615,
%T 15169751,58074521,223081286,859450114,3319751314,12852496680,
%U 49860496892,193783946748,754379484650,2941051327294,11481400024511,44875877924939
%N Number of 2 X n 0..1 arrays with the number of 1's horizontally, diagonally or antidiagonally adjacent to some 0 equal to the number of 0's adjacent to some 1, with top left element zero.
%C Row 2 of A284334.
%H R. H. Hardin, <a href="/A284335/b284335.txt">Table of n, a(n) for n = 1..210</a>
%e Some solutions for n=4
%e ..0..1..1..0. .0..1..1..0. .0..0..0..0. .0..0..1..0. .0..0..1..1
%e ..0..1..0..1. .0..1..1..0. .1..1..1..1. .1..1..1..0. .0..1..0..1
%Y Cf. A284334.
%K nonn
%O 1,1
%A _R. H. Hardin_, Mar 25 2017
