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A223664 Number of n X n 0..1 arrays with rows, diagonals and antidiagonals unimodal 0
2, 16, 292, 6454, 136289, 2715255, 51831694, 962697852, 17643516790, 323311474180 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A223669

LINKS

Table of n, a(n) for n=1..10.

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Sequence in context: A009795 A182562 A112722 * A189611 A189689 A188740

Adjacent sequences:  A223661 A223662 A223663 * A223665 A223666 A223667

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 25 2013

STATUS

approved

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Last modified July 5 06:18 EDT 2022. Contains 355088 sequences. (Running on oeis4.)