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A223717 Number of n X n 0..2 arrays with rows, antidiagonals and columns unimodal 0
3, 81, 5883, 608855, 74140718, 9991366555, 1461411174370, 229731305080429, 38440119395606004 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A223725

LINKS

Table of n, a(n) for n=1..9.

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A209587 A223736 A207229 * A223825 A207222 A207007

Adjacent sequences:  A223714 A223715 A223716 * A223718 A223719 A223720

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 26 2013

STATUS

approved

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Last modified January 24 21:49 EST 2022. Contains 350565 sequences. (Running on oeis4.)