A223812 Number of nX3 0..2 arrays with row sums nondecreasing and column sums unimodal

22, 337, 4120, 43941, 426527, 3875213, 33540705, 279734339, 2266708593, 17952142360, 139568672552, 1068728748298, 8081450512876, 60468894195838, 448444819136394, 3300666311519663, 24136833802226245, 175525144342241365

Offset

1,1

Comments

Column 3 of A223815

Links

R. H. Hardin, Table of n, a(n) for n = 1..64

Example

Some solutions for n=3
..1..1..2....2..0..1....1..2..0....1..0..0....1..0..0....0..2..0....1..2..0
..2..2..0....0..1..2....1..1..1....1..1..2....0..2..0....1..2..0....2..2..0
..0..2..2....1..2..1....1..2..2....0..2..2....1..1..0....2..2..2....1..1..2

Crossrefs

Sequence in context: A019623 A021794 A348134 * A018090 A021274 A021534

Adjacent sequences: A223809 A223810 A223811 * A223813 A223814 A223815

Keyword

nonn

Author

R. H. Hardin Mar 27 2013

Status

approved