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A223763 Number of n X n 0..1 arrays with rows, columns and antidiagonals unimodal and diagonals nondecreasing 0
2, 12, 71, 361, 1748, 8007, 35513, 153450, 651075, 2723829, 11275932, 46302339, 188958191, 767474182, 3105857015 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A223770

LINKS

Table of n, a(n) for n=1..15.

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A012421 A012381 A012376 * A002630 A009552 A002670

Adjacent sequences:  A223760 A223761 A223762 * A223764 A223765 A223766

KEYWORD

nonn

AUTHOR

_R. H. Hardin_ Mar 27 2013

STATUS

approved

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Last modified February 21 18:05 EST 2020. Contains 332107 sequences. (Running on oeis4.)