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A207284 Number of n X n 0..3 arrays avoiding the pattern z-2 z-1 z in any row or column 0
4, 256, 216952, 2663436930, 464024582705468, 1155689817715438142804, 41064557653205497965204017422, 20826195419129636302248989735404338974 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A207290

LINKS

Table of n, a(n) for n=1..8.

EXAMPLE

Some solutions for n=4

..0..2..2..1....2..2..1..0....1..3..2..1....0..1..0..3....1..3..0..1

..1..0..1..1....3..2..2..0....1..1..0..3....2..2..1..2....0..0..1..0

..3..2..1..0....2..3..0..0....2..3..3..0....1..1..3..2....0..1..1..3

..0..3..0..0....1..2..0..2....0..2..1..3....0..3..3..0....3..0..3..1

CROSSREFS

Sequence in context: A223579 A206832 A206894 * A229100 A060757 A136807

Adjacent sequences:  A207281 A207282 A207283 * A207285 A207286 A207287

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 16 2012

STATUS

approved

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Last modified November 28 23:48 EST 2021. Contains 349415 sequences. (Running on oeis4.)