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 A186171 Number of (n+2)X(n+2) 0..5 arrays with each 3X3 subblock having rows and columns in lexicographically nondecreasing order 1
 520017, 311128593, 188034884094, 111203560772547, 63117570540037053, 34184079614729409659, 17695100284866122677270, 8806300375583656355791730, 4233722976051532579394137546, 1964837017618166811806637674433 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Diagonal of A186180 LINKS R. H. Hardin, Table of n, a(n) for n = 1..11 EXAMPLE Some solutions for 4X4 ..0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0 ..0..0..0..3....0..0..0..3....0..0..0..3....0..0..0..0....0..0..0..0 ..1..1..1..5....0..0..1..1....0..1..2..5....0..1..4..5....0..1..2..3 ..1..1..2..5....0..3..1..0....5..3..5..4....0..4..4..0....0..4..4..5 CROSSREFS Sequence in context: A236095 A186180 A186172 * A251043 A250705 A237217 Adjacent sequences:  A186168 A186169 A186170 * A186172 A186173 A186174 KEYWORD nonn AUTHOR R. H. Hardin Feb 13 2011 STATUS approved

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Last modified December 3 02:56 EST 2020. Contains 338899 sequences. (Running on oeis4.)