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A224403 Number of n X n 0..1 arrays with rows unimodal and antidiagonals nondecreasing 1
2, 12, 100, 884, 7812, 68282, 590254, 5055858, 42996954, 363652198, 3062704166, 25711681080, 215327121414, 1799987423914, 15026012170736, 125307656075926, 1044220994847456, 8697261784264396, 72413790737672880, 602789200212580366 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A224409

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..50

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A227084 A064370 A138421 * A219534 A151392 A000888

Adjacent sequences:  A224400 A224401 A224402 * A224404 A224405 A224406

KEYWORD

nonn

AUTHOR

R. H. Hardin Apr 05 2013

STATUS

approved

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Last modified September 26 14:21 EDT 2022. Contains 356999 sequences. (Running on oeis4.)