A223712 - OEIS

A223712

Number of nX3 0..1 arrays with row sums and column sums unimodal

7, 53, 333, 1805, 8953, 41389, 180718, 757748, 3072208, 12100344, 46606802, 176082080, 653863108, 2394225532, 8658131447, 30954618019, 109609761829, 384756220575, 1339683464511, 4632090161405, 15913128409903, 54338332894979

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

Column 3 of A223716

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..116

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A200766 A056590 A223778 * A065542 A279269 A015561

Adjacent sequences: A223709 A223710 A223711 * A223713 A223714 A223715

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 26 2013

STATUS

approved