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%I #6 Mar 31 2012 12:36:00
%S 45,193,631,1837,5313,16345,54543,194245,719905,2725367,10430675,
%T 40158073,155173369,601154073,2333701711,9075257125,35345417073,
%U 137846719279,538258108483,2104099248441,8233431070825,32247604093423
%N Number of (n+2)X(n+2) binary arrays with each 3X3 subblock having rows and columns in lexicographically nondecreasing order
%C Diagonal of A184548
%H R. H. Hardin, <a href="/A184539/b184539.txt">Table of n, a(n) for n = 1..68</a>
%e Some solutions for 4X4
%e ..0..0..1..1....0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..1
%e ..0..0..1..1....0..0..0..1....0..0..0..0....0..0..0..1....0..1..1..1
%e ..1..1..0..1....0..0..1..1....0..0..1..1....0..0..0..1....0..1..1..1
%e ..1..1..0..1....0..0..1..1....1..1..0..0....0..0..0..1....0..1..1..1
%K nonn
%O 1,1
%A _R. H. Hardin_ Jan 16 2011
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