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A223638 Number of n X n 0..1 arrays with rows, columns, diagonals and antidiagonals unimodal 0
2, 16, 218, 2962, 36947, 428187, 4682514, 49045356, 497721760, 4944054774 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A223644

LINKS

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

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Sequence in context: A267782 A012164 A264543 * A188688 A188844 A187657

Adjacent sequences:  A223635 A223636 A223637 * A223639 A223640 A223641

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 24 2013

STATUS

approved

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Last modified December 8 20:37 EST 2021. Contains 349596 sequences. (Running on oeis4.)