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%I #5 Mar 31 2012 12:36:04
%S 15426974,2466606274,384595851458,47475070890310,6706785849517148,
%T 936496872238986044,127786000491037137748,17715530704266966622328,
%U 2450423833775651684970790,338228103996552089150434500
%N Number of (n+2)X9 binary arrays with each 3X3 subblock singular
%C Column 7 of A186052
%H R. H. Hardin, <a href="/A186050/b186050.txt">Table of n, a(n) for n = 1..16</a>
%e Some solutions for 4X9
%e ..0..0..0..0..0..0..0..0..0....0..0..0..0..0..1..1..1..0
%e ..0..0..0..0..0..0..1..0..0....0..0..0..0..1..0..0..0..0
%e ..0..0..0..0..0..0..0..0..1....0..0..0..0..0..0..0..1..1
%e ..0..0..0..0..0..1..1..0..0....0..0..0..0..1..1..0..1..0
%K nonn
%O 1,1
%A _R. H. Hardin_ Feb 11 2011