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A224347 Number of n X n 0..2 arrays with diagonals and antidiagonals unimodal and rows nondecreasing 0
3, 36, 788, 19608, 495985, 12340932, 300892325, 7202270426, 169987960308, 3972599259664, 92292550974356 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A224353

LINKS

Table of n, a(n) for n=1..11.

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A301582 A122220 A186730 * A227251 A326273 A224006

Adjacent sequences:  A224344 A224345 A224346 * A224348 A224349 A224350

KEYWORD

nonn

AUTHOR

R. H. Hardin Apr 04 2013

STATUS

approved

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Last modified January 25 07:55 EST 2020. Contains 331241 sequences. (Running on oeis4.)