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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.)