A186171 Number of (n+2)X(n+2) 0..5 arrays with each 3X3 subblock having rows and columns in lexicographically nondecreasing order

520017, 311128593, 188034884094, 111203560772547, 63117570540037053, 34184079614729409659, 17695100284866122677270, 8806300375583656355791730, 4233722976051532579394137546, 1964837017618166811806637674433

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 A364263 A250705

Adjacent sequences: A186168 A186169 A186170 * A186172 A186173 A186174

Keyword

nonn

Author

R. H. Hardin Feb 13 2011

Status

approved