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A202576 Number of nX2 0..3 arrays with the row and column sums nondecreasing 1
10, 90, 616, 3731, 20208, 102665, 492118, 2275947, 10175908, 44549594, 190996160, 808576340, 3377247432, 13999854480, 57518174798, 235275969669, 956569084218, 3879844758272, 15670308778784, 63219573247523, 254277270362900 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A202581

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..51

EXAMPLE

Some solutions for n=5

..0..1....1..2....0..3....0..1....0..3....1..3....1..1....1..1....1..0....0..1

..1..1....0..3....3..0....2..0....1..2....1..3....2..1....1..2....1..3....0..2

..1..1....3..1....0..3....0..3....3..2....2..2....1..2....1..2....2..2....0..2

..1..1....3..1....1..3....1..2....3..2....1..3....2..1....1..3....2..2....1..3

..2..3....1..3....3..3....3..2....2..3....3..1....1..2....1..3....3..2....2..3

CROSSREFS

Sequence in context: A044261 A065690 A202919 * A201723 A228418 A306958

Adjacent sequences:  A202573 A202574 A202575 * A202577 A202578 A202579

KEYWORD

nonn

AUTHOR

R. H. Hardin Dec 21 2011

STATUS

approved

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Last modified October 26 02:14 EDT 2021. Contains 348256 sequences. (Running on oeis4.)