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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

R. H. Hardin, Table of n, a(n) for n = 1..26

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

Adjacent sequences:  A185465 A185466 A185467 * A185469 A185470 A185471

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 28 2011

STATUS

approved

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Last modified December 6 09:43 EST 2021. Contains 349563 sequences. (Running on oeis4.)