A233351 Number of (n+1)X(1+1) 0..3 arrays x(i,j) with row sums sum{x(i,j), j=1..1+1} nondecreasing, and column sums sum{i^2*x(i,j), i=1..n+1} nondecreasing

80, 556, 3362, 18445, 94060, 454538, 2109213, 9486430, 41642985, 179349952, 760872901, 3189476955, 13243160545, 54571364182, 223510706911, 911004934329, 3698792967378

Offset

1,1

Comments

Column 1 of A233353

Links

Table of n, a(n) for n=1..17.

Example

Some solutions for n=5
..0..0....1..0....2..1....0..0....0..2....0..0....0..1....2..0....1..0....0..2
..3..0....1..1....2..1....3..1....2..0....0..1....0..1....1..2....2..1....0..3
..2..1....1..1....1..3....1..3....1..1....0..1....1..1....2..2....2..1....3..1
..2..2....3..1....1..3....3..2....0..3....0..1....1..1....2..3....3..1....2..2
..2..3....2..3....1..3....2..3....3..1....1..0....2..0....2..3....1..3....3..1
..2..3....2..3....3..2....2..3....1..3....1..3....1..3....2..3....1..3....1..3

Crossrefs

Sequence in context: A233353 A233354 A200432 * A365887 A107624 A068782

Adjacent sequences: A233348 A233349 A233350 * A233352 A233353 A233354

Keyword

nonn

Author

R. H. Hardin, Dec 07 2013

Status

approved