A233372 Number of (n+1)X(1+1) 0..2 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

28, 117, 444, 1588, 5387, 17645, 56425, 177289, 549976, 1690006, 5158577, 15668130, 47422454, 143161949, 431407408, 1298283373, 3903506520, 11728583997, 35224065039, 105750970102

Offset

1,1

Comments

Column 1 of A233374

Links

Table of n, a(n) for n=1..20.

Example

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

Crossrefs

Sequence in context: A042536 A042538 A251320 * A220755 A244079 A330533

Adjacent sequences: A233369 A233370 A233371 * A233373 A233374 A233375

Keyword

nonn

Author

R. H. Hardin, Dec 08 2013

Status

approved