A233362 Number of (n+1)X(3+1) 0..1 arrays x(i,j) with row sums sum{j*x(i,j), j=1..3+1} nondecreasing, and column sums sum{i^2*x(i,j), i=1..n+1} nondecreasing

23, 113, 568, 2639, 10477, 38240, 132356, 441895, 1419797, 4391603, 13112413, 37979354, 106993204, 293812166, 789782037, 2085497193, 5420670439, 13888977532, 35116145716, 87723703925

Offset

1,1

Comments

Column 3 of A233366

Links

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

Example

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

Crossrefs

Sequence in context: A101804 A142324 A337425 * A288751 A070024 A111943

Adjacent sequences: A233359 A233360 A233361 * A233363 A233364 A233365

Keyword

nonn

Author

R. H. Hardin, Dec 08 2013

Status

approved