A232884 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*x(i,j), i=1..n+1} nondecreasing

83, 578, 3473, 18886, 95877, 462013, 2138895, 9598529, 42066595, 180962518, 766952748, 3211904613, 13326255821, 54883286211, 224676789663, 915299640977, 3714702927144, 15031048272068, 60672346264225, 244415984430509

Offset

1,1

Comments

Column 1 of A232886

Links

R. H. Hardin, Table of n, a(n) for n = 1..30

Example

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

Crossrefs

Sequence in context: A033248 A232886 A232887 * A142289 A164758 A142751

Adjacent sequences: A232881 A232882 A232883 * A232885 A232886 A232887

Keyword

nonn

Author

R. H. Hardin, Dec 02 2013

Status

approved