A232678 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*x(i,j), i=1..n+1} nondecreasing

86, 562, 2985, 14027, 59228, 229332, 831604, 2851809, 9325995, 29328607, 89150381, 263046025, 756504326, 2126823610, 5859328828, 15854904128, 42214959089, 110768292616, 286828441922, 733847705458, 1856968194517, 4651729423211

Offset

1,1

Comments

Column 1 of A232680

Links

R. H. Hardin, Table of n, a(n) for n = 1..31

Example

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

Crossrefs

Sequence in context: A232754 A232760 A232680 * A272379 A262916 A262331

Adjacent sequences: A232675 A232676 A232677 * A232679 A232680 A232681

Keyword

nonn

Author

R. H. Hardin, Nov 27 2013

Status

approved