A233299 Number of (n+1)X(3+1) 0..1 arrays x(i,j) with row sums sum{x(i,j), j=1..3+1} nondecreasing, and column sums sum{i^2*x(i,j), i=1..n+1} nondecreasing

22, 105, 567, 3556, 21856, 135636, 836259, 5134856, 31326263, 190404404, 1153108628, 6966626079, 42004555617, 252889763684

Offset

1,1

Comments

Column 3 of A233301

Links

Table of n, a(n) for n=1..14.

Example

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

Crossrefs

Sequence in context: A231225 A124950 A126409 * A261534 A041938 A084013

Adjacent sequences: A233296 A233297 A233298 * A233300 A233301 A233302

Keyword

nonn

Author

R. H. Hardin, Dec 07 2013

Status

approved