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A223631 Number of n X n 0..1 arrays with rows, antidiagonals and columns unimodal 0
2, 16, 229, 3712, 61545, 1026377, 17224974, 291563806, 4984273228, 86086143903, 1502219415538 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A223637

LINKS

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

EXAMPLE

Some solutions for n=4

..1..0..0..0....0..1..0..0....0..0..0..0....0..0..1..0....1..1..1..0

..1..1..1..1....0..0..0..0....1..1..0..0....1..1..1..1....1..1..1..1

..1..1..1..1....0..0..0..1....1..1..1..1....0..0..1..1....1..1..1..1

..0..0..0..1....0..0..0..1....0..0..1..1....0..0..0..1....1..1..1..0

CROSSREFS

Sequence in context: A187657 A047657 A233141 * A188500 A188515 A152542

Adjacent sequences:  A223628 A223629 A223630 * A223632 A223633 A223634

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 24 2013

STATUS

approved

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Last modified January 27 16:41 EST 2022. Contains 350611 sequences. (Running on oeis4.)