A223662 Number of nX4 0..3 arrays with row sums unimodal and column sums inverted unimodal

130, 29922, 5285887, 761845474, 93974096640, 10253839694278, 1013084819998517, 92199924066276051, 7830543600441814997, 626952495503328450002

Offset

1,1

Comments

Column 4 of A223663

Links

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

Example

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

Crossrefs

Sequence in context: A223872 A223797 A243480 * A224112 A184283 A246242

Adjacent sequences: A223659 A223660 A223661 * A223663 A223664 A223665

Keyword

nonn

Author

R. H. Hardin Mar 25 2013

Status

approved