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A223661 Number of nX3 0..3 arrays with row sums unimodal and column sums inverted unimodal 1
50, 3060, 141046, 5285887, 169756788, 4836834467, 125226945708, 2997363216275, 67192414310968, 1424909830742272, 28811928773038893, 559031955620162864, 10462533894185251783, 189688734342719058204, 3343610975591843927435 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A223663

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..24

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A203842 A251058 A239653 * A224111 A047683 A010564

Adjacent sequences:  A223658 A223659 A223660 * A223662 A223663 A223664

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 25 2013

STATUS

approved

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Last modified May 17 08:05 EDT 2022. Contains 353741 sequences. (Running on oeis4.)