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A223712 Number of nX3 0..1 arrays with row sums and column sums unimodal 1
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

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Last modified February 26 11:03 EST 2020. Contains 332279 sequences. (Running on oeis4.)