A233030 Number of (n+1)X(3+1) 0..3 arrays with row and column sums nondecreasing, and no adjacent elements equal

333, 3132, 55642, 566933, 7169782, 74939353, 839537894, 8735284526, 93454206487, 969444236906, 10189585915899

Offset

1,1

Comments

Column 3 of A233031

Links

Table of n, a(n) for n=1..11.

Example

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

Crossrefs

Sequence in context: A043503 A202311 A319011 * A250835 A378893 A221827

Adjacent sequences: A233027 A233028 A233029 * A233031 A233032 A233033

Keyword

nonn

Author

R. H. Hardin, Dec 03 2013

Status

approved