A233053 Number of (n+1)X(1+1) 0..3 arrays x(i,j) with row sums sum{j*x(i,j), j=1..1+1} nondecreasing, and column sums sum{i^2*x(i,j), i=1..n+1} nondecreasing

84, 567, 3133, 14845, 63271, 247417, 902423, 3108716, 10209449, 32207605, 98154943, 290310578, 836513294, 2355540855, 6499105996, 17608261667, 46934388222, 123274868963

Offset

1,1

Comments

Column 1 of A233055

Links

Table of n, a(n) for n=1..18.

Example

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

Crossrefs

Sequence in context: A233055 A233056 A211260 * A220203 A008429 A175813

Adjacent sequences: A233050 A233051 A233052 * A233054 A233055 A233056

Keyword

nonn

Author

R. H. Hardin, Dec 03 2013

Status

approved