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A223858 Number of n X n 0..3 arrays with rows and antidiagonals unimodal and columns nondecreasing 0
4, 100, 4884, 315124, 23738426, 1989679315, 181330154458, 17720685250743, 1838270364212150, 200766237618388230, 22925992371163981667, 2721355255765297425689 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A223864

LINKS

Table of n, a(n) for n=1..12.

EXAMPLE

Some solutions for n=3

..0..1..2....0..0..2....0..0..1....1..0..0....3..0..0....0..1..3....0..1..1

..0..1..2....1..1..3....1..1..2....2..0..0....3..3..0....0..2..3....0..1..1

..0..3..2....1..2..3....1..3..2....3..2..2....3..3..0....0..2..3....3..3..3

CROSSREFS

Sequence in context: A127776 A266524 A224167 * A223981 A224385 A249939

Adjacent sequences:  A223855 A223856 A223857 * A223859 A223860 A223861

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 28 2013

STATUS

approved

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Last modified August 3 08:21 EDT 2021. Contains 346435 sequences. (Running on oeis4.)