A224403 Number of n X n 0..1 arrays with rows unimodal and antidiagonals nondecreasing

2, 12, 100, 884, 7812, 68282, 590254, 5055858, 42996954, 363652198, 3062704166, 25711681080, 215327121414, 1799987423914, 15026012170736, 125307656075926, 1044220994847456, 8697261784264396, 72413790737672880, 602789200212580366

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 A379331 A151392

Adjacent sequences: A224400 A224401 A224402 * A224404 A224405 A224406

Keyword

nonn

Author

R. H. Hardin Apr 05 2013

Status

approved