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A184377 1/12 the number of (n+2)X(n+2) 0..2 arrays with each 3X3 subblock containing three of each value 0
140, 1494, 8936, 38642, 207470, 890982, 3651098 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A184386

LINKS

Table of n, a(n) for n=1..7.

EXAMPLE

Some solutions with a(1,1)=0 for 4X4

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

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

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

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

CROSSREFS

Sequence in context: A330446 A317984 A133711 * A255775 A199831 A264310

Adjacent sequences: A184374 A184375 A184376 * A184378 A184379 A184380

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 12 2011

STATUS

approved

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Last modified January 26 22:13 EST 2023. Contains 359836 sequences. (Running on oeis4.)