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A224044 Number of n X n 0..3 arrays with rows and columns unimodal and antidiagonals nondecreasing 0
4, 160, 9731, 638996, 41991129, 2701569493, 169750613182, 10454910167463, 634179969235617, 38050532050437859 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A224050

LINKS

Table of n, a(n) for n=1..10.

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A268047 A278770 A264568 * A224275 A224198 A104133

Adjacent sequences:  A224041 A224042 A224043 * A224045 A224046 A224047

KEYWORD

nonn

AUTHOR

R. H. Hardin Apr 01 2013

STATUS

approved

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Last modified May 22 21:50 EDT 2019. Contains 323504 sequences. (Running on oeis4.)