A224122 Number of nX4 0..3 arrays with row sums nondecreasing and column sums unimodal

130, 16782, 1703178, 145901795, 11066001160, 766386005577, 49489265853382, 3023718149469925, 176685707320506238, 9953671018445272136

Offset

1,1

Comments

Column 4 of A224123

Links

Table of n, a(n) for n=1..10.

Example

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

Crossrefs

Sequence in context: A224277 A224200 A333900 * A223808 A223758 A223846

Adjacent sequences: A224119 A224120 A224121 * A224123 A224124 A224125

Keyword

nonn

Author

R. H. Hardin Mar 31 2013

Status

approved