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A187639 Number of (n+2)X(n+2) 0..2 arrays with each 3X3 subblock having sum 9 0
3139, 79259, 1342083, 17048731, 234213387 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A187645

LINKS

Table of n, a(n) for n=1..5.

EXAMPLE

Some solutions for 4X4

..0..2..0..1....1..1..1..0....1..2..1..0....1..2..1..1....0..1..2..0

..1..0..0..0....1..1..0..1....1..1..0..0....1..0..0..2....2..0..0..1

..2..2..2..2....0..2..2..1....0..1..2..2....2..2..0..1....1..1..2..2

..0..0..2..1....1..1..1..0....1..2..1..0....1..2..1..1....1..0..2..1

CROSSREFS

Sequence in context: A180297 A187645 A187640 * A322536 A172641 A172744

Adjacent sequences:  A187636 A187637 A187638 * A187640 A187641 A187642

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 12 2011

STATUS

approved

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Last modified January 19 22:12 EST 2022. Contains 350466 sequences. (Running on oeis4.)