A224121 Number of nX3 0..3 arrays with row sums nondecreasing and column sums unimodal

50, 1747, 47059, 1070499, 21632718, 400993828, 6962188526, 114852977638, 1818933416948, 27867476494858, 415428832366407, 6052984236034862, 86509041863415952, 1216196228905636823, 16857689384122403297

Offset

1,1

Comments

Column 3 of A224123

Links

R. H. Hardin, Table of n, a(n) for n = 1..22

Example

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

Crossrefs

Sequence in context: A062151 A001241 A164986 * A238283 A240191 A231696

Adjacent sequences: A224118 A224119 A224120 * A224122 A224123 A224124

Keyword

nonn

Author

R. H. Hardin Mar 31 2013

Status

approved