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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
OFFSET
1,1
COMMENTS
Column 3 of A223716
LINKS
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
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 26 2013
STATUS
approved