A224112 Number of nX4 0..3 arrays with row sums and column sums unimodal.

130, 29922, 5286827, 762031090, 93991412090, 10255460738958, 1013220280453733, 92210504283006019, 7831312042691678373, 627005888003354035318

Offset

1,1

Comments

Column 4 of A224113

Links

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

Example

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

Crossrefs

Sequence in context: A223797 A243480 A223662 * A184283 A246242 A001331

Adjacent sequences: A224109 A224110 A224111 * A224113 A224114 A224115

Keyword

nonn

Author

R. H. Hardin, Mar 31 2013

Status

approved