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A224140 Number of n X n 0..1 arrays with rows and antidiagonals unimodal and columns nondecreasing 1
2, 9, 49, 272, 1509, 8375, 46586, 259927, 1454873, 8167578, 45975525, 259412481, 1466771294, 8308711329, 47142516717, 267868554552, 1524033271457, 8681096155047, 49500982033342, 282533898125471, 1614019099745197 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A224146

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..22

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A191005 A257544 A295944 * A000167 A241785 A109323

Adjacent sequences:  A224137 A224138 A224139 * A224141 A224142 A224143

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 31 2013

STATUS

approved

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Last modified August 22 08:18 EDT 2019. Contains 326172 sequences. (Running on oeis4.)