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A223926 Number of n X n 0..2 arrays with rows, columns and antidiagonals unimodal and diagonals nondecreasing 0
3, 54, 1116, 21334, 386495, 6621074, 108796955, 1735753333, 27144561576 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A223933

LINKS

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

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A157541 A182159 A065102 * A003776 A222203 A224051

Adjacent sequences: A223923 A223924 A223925 * A223927 A223928 A223929

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 29 2013

STATUS

approved

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Last modified December 4 09:27 EST 2022. Contains 358556 sequences. (Running on oeis4.)