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A223832 Number of n X n 0..1 arrays with rows and antidiagonals unimodal and columns nondecreasing 0
2, 9, 48, 249, 1240, 5992, 28369, 132427, 611901, 2805670, 12786249, 57979474, 261797013, 1177774158, 5281497918 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A223838

LINKS

Table of n, a(n) for n=1..15.

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A059272 A228341 A289576 * A323958 A306356 A188818

Adjacent sequences:  A223829 A223830 A223831 * A223833 A223834 A223835

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 27 2013

STATUS

approved

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Last modified May 27 21:52 EDT 2020. Contains 334671 sequences. (Running on oeis4.)