A233120 Number of (3+1)X(n+1) 0..2 arrays x(i,j) with row sums sum{x(i,j), j=1..n+1} nondecreasing, and column sums sum{i*x(i,j), i=1..3+1} nondecreasing.

464, 11741, 252958, 4736663, 79223727, 1206772195, 16999415895, 224076967817, 2789987429279, 33062492784645, 375228791717746, 4099407920673301, 43300262048665772, 443810526543291788, 4427981986413355672

Offset

1,1

Comments

Row 3 of A233117

Links

R. H. Hardin, Table of n, a(n) for n = 1..16

Example

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

Crossrefs

Sequence in context: A254693 A247852 A233352 * A115441 A028383 A263971

Adjacent sequences: A233117 A233118 A233119 * A233121 A233122 A233123

Keyword

nonn

Author

R. H. Hardin, Dec 04 2013

Status

approved