A232828 Number of (n+1)X(4+1) 0..1 arrays x(i,j) with row sums sum{j*x(i,j), j=1..4+1} nondecreasing, and column sums sum{i*x(i,j), i=1..n+1} nondecreasing

36, 316, 2329, 16684, 111870, 706823, 4251357, 24298903, 132106886, 687220332, 3437408202, 16607221811, 77820433157

Offset

1,1

Comments

Column 4 of A232831

Links

Table of n, a(n) for n=1..13.

Example

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

Crossrefs

Sequence in context: A222860 A270601 A361187 * A092643 A045786 A237128

Adjacent sequences: A232825 A232826 A232827 * A232829 A232830 A232831

Keyword

nonn

Author

R. H. Hardin, Nov 30 2013

Status

approved