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A185468 Number of (n+2)X(n+2) 0..2 arrays with each 3X3 subblock having rows and columns in lexicographically nondecreasing order 1
1169, 21834, 308692, 3959167, 46410729, 493061605, 4845252741, 45945546278, 443977171724, 4605035061272, 52677880798334, 659609567593921, 8802320668197926, 122014363451316512, 1727721369461575287 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Diagonal of A185477
LINKS
EXAMPLE
Some solutions for 4X4
..0..0..0..2....0..0..0..0....0..0..2..2....0..0..0..2....0..0..1..1
..0..0..1..2....1..1..1..2....0..0..2..2....0..1..2..2....0..1..1..1
..0..1..1..2....1..1..2..0....0..0..2..2....0..2..1..1....0..1..1..2
..1..2..2..0....1..1..2..1....1..1..1..2....0..2..1..1....2..2..2..0
CROSSREFS
Sequence in context: A185477 A185469 A065656 * A209825 A264688 A043432
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 28 2011
STATUS
approved

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Last modified February 20 21:52 EST 2024. Contains 370219 sequences. (Running on oeis4.)