A223991 Number of 6Xn 0..3 arrays with rows unimodal and columns nondecreasing

84, 7056, 325120, 9647292, 204647416, 3322756326, 43307637038, 469239396496, 4340915844892, 35013234463686, 250416999823220, 1610131956940138, 9414450936518133, 50540930874984955, 251164546472066722

Offset

1,1

Comments

Row 6 of A223987

Links

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

R. H. Hardin, Empirical polynomial of degree 36

Formula

Empirical polynomial of degree 36 (see link above)

Example

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

Crossrefs

Sequence in context: A224177 A223869 A224389 * A224022 A283947 A265586

Adjacent sequences: A223988 A223989 A223990 * A223992 A223993 A223994

Keyword

nonn

Author

R. H. Hardin Mar 30 2013

Status

approved