A202577 Number of nX3 0..3 arrays with the row and column sums nondecreasing

20, 616, 15688, 343827, 6776376, 123282439, 2108296388, 34358272840, 538646901836, 8180787550288, 121042309430814, 1752140900283557, 24896080430892382, 348195329411678801, 4803948400755983252

Offset

1,1

Comments

Column 3 of A202581

Links

R. H. Hardin, Table of n, a(n) for n = 1..18

Example

Some solutions for n=3
..0..2..1....0..1..1....1..1..3....0..1..1....0..1..3....2..1..1....1..2..0
..0..3..1....1..3..1....3..1..1....1..0..2....3..1..2....0..2..2....0..3..3
..3..0..3....3..1..3....0..3..2....1..3..1....2..3..1....2..1..1....2..1..3

Crossrefs

Sequence in context: A116218 A035279 A015268 * A059420 A129906 A125722

Adjacent sequences: A202574 A202575 A202576 * A202578 A202579 A202580

Keyword

nonn

Author

R. H. Hardin Dec 21 2011

Status

approved