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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.)