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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
OFFSET
1,1
COMMENTS
Diagonal of A224409
LINKS
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
KEYWORD
nonn
AUTHOR
R. H. Hardin Apr 05 2013
STATUS
approved