A223661 Number of nX3 0..3 arrays with row sums unimodal and column sums inverted unimodal

50, 3060, 141046, 5285887, 169756788, 4836834467, 125226945708, 2997363216275, 67192414310968, 1424909830742272, 28811928773038893, 559031955620162864, 10462533894185251783, 189688734342719058204, 3343610975591843927435

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