A233057 Number of (2+1)X(n+1) 0..3 arrays x(i,j) with row sums sum{j*x(i,j), j=1..n+1} nondecreasing, and column sums sum{i^2*x(i,j), i=1..2+1} nondecreasing

567, 12943, 230008, 3388003, 42636091, 469323351, 4607489801, 40982900059, 334422112594, 2527496746520, 17840951367541, 118449958746452, 743824605320424

Offset

1,1

Comments

Row 2 of A233055

Links

Table of n, a(n) for n=1..13.

Example

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

Crossrefs

Sequence in context: A252599 A023099 A209954 * A087424 A134922 A322688

Adjacent sequences: A233054 A233055 A233056 * A233058 A233059 A233060

Keyword

nonn

Author

R. H. Hardin, Dec 03 2013

Status

approved