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A223981 Number of n X n 0..3 arrays with rows unimodal and columns nondecreasing 1
4, 100, 5029, 358118, 31831914, 3322756326, 392525216516, 51162688962195, 7224066705841458, 1089938030989276020, 173886286002145386302, 29095306392044768817550, 5072863442986308208335738 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A223987

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..14

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A266524 A224167 A223858 * A224385 A249939 A224018

Adjacent sequences:  A223978 A223979 A223980 * A223982 A223983 A223984

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 30 2013

STATUS

approved

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Last modified January 20 23:18 EST 2022. Contains 350473 sequences. (Running on oeis4.)