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%I #6 Mar 31 2012 12:36:05
%S 520017,311128593,188034884094,111203560772547,63117570540037053,
%T 34184079614729409659,17695100284866122677270,
%U 8806300375583656355791730,4233722976051532579394137546,1964837017618166811806637674433
%N Number of (n+2)X(n+2) 0..5 arrays with each 3X3 subblock having rows and columns in lexicographically nondecreasing order
%C Diagonal of A186180
%H R. H. Hardin, <a href="/A186171/b186171.txt">Table of n, a(n) for n = 1..11</a>
%e Some solutions for 4X4
%e ..0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0
%e ..0..0..0..3....0..0..0..3....0..0..0..3....0..0..0..0....0..0..0..0
%e ..1..1..1..5....0..0..1..1....0..1..2..5....0..1..4..5....0..1..2..3
%e ..1..1..2..5....0..3..1..0....5..3..5..4....0..4..4..0....0..4..4..5
%K nonn
%O 1,1
%A _R. H. Hardin_ Feb 13 2011
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