A233060 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*x(i,j), i=1..n+1} nondecreasing

22, 130, 723, 4393, 26819, 162916, 986252, 5942365, 35694392, 213988742, 1280906379, 7658873200, 45771779047, 273459449270, 1633697384455

Offset

1,1

Comments

Column 3 of A233062

Links

Table of n, a(n) for n=1..15.

Example

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

Crossrefs

Sequence in context: A125247 A249302 A095694 * A299520 A003778 A254698

Adjacent sequences: A233057 A233058 A233059 * A233061 A233062 A233063

Keyword

nonn

Author

R. H. Hardin, Dec 03 2013

Status

approved