A223959 Number of nX6 0..3 arrays with antidiagonals unimodal and rows and diagonals nondecreasing.

84, 3906, 92734, 1718057, 30643468, 556027700, 10269723035, 191829887779, 3609049327918, 68212899813271, 1293084011261962, 24559344963113337, 467028467106529258, 8888318851289202078, 169249293097773923431

Offset: 1

Author

R. H. Hardin Mar 29 2013

Keywords

• nonn

Comments

Column 6 of A223961

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..210