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%I #4 Dec 10 2012 18:15:06
%S 1,12,92,572,4062,29467,213225,1540686,11163495,80656708,581473349,
%T 4190483128,30199355040,217538559602,1566825952174,11283025994195,
%U 81236036737903,584831754731217,4210022381269251,30304818855812080
%N Equals two maps: number of 3Xn binary arrays indicating the locations of corresponding elements equal to exactly two of their horizontal and antidiagonal neighbors in a random 0..1 3Xn array
%C Row 3 of A220328
%H R. H. Hardin, <a href="/A220330/b220330.txt">Table of n, a(n) for n = 1..22</a>
%e Some solutions for n=3
%e ..0..1..0....0..0..0....0..0..0....0..1..1....0..1..0....0..1..0....0..0..0
%e ..0..1..0....1..0..1....1..1..0....0..1..0....0..1..1....1..1..0....0..0..1
%e ..0..0..0....1..1..0....0..1..0....1..1..0....0..0..0....0..1..0....0..1..0
%K nonn
%O 1,2
%A _R. H. Hardin_ Dec 10 2012
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