A203323 Number of n X n 0..2 arrays with the row and column sums nondecreasing

3, 32, 1510, 423595, 759320283, 9306918766618

Offset

1,1

Comments

Diagonal of A203330

Links

Table of n, a(n) for n=1..6.

Example

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

Crossrefs

Sequence in context: A202806 A368601 A054780 * A367565 A222683 A134474

Adjacent sequences: A203320 A203321 A203322 * A203324 A203325 A203326

Keyword

nonn

Author

R. H. Hardin Dec 31 2011

Status

approved