A186050 - OEIS

%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