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A203324 Number of nX2 0..2 arrays with the row and column sums nondecreasing 1
6, 32, 133, 510, 1792, 6050, 19641, 62471, 194925, 601743, 1839745, 5593544, 16923954, 51060524, 153682210, 461909664, 1386731666, 4160516211, 12476101149, 37401839918, 112103310741, 335973601041, 1006854198479, 3017347570591 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A203330

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..186

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Sequence in context: A239573 A130410 A202807 * A027217 A245128 A121333

Adjacent sequences:  A203321 A203322 A203323 * A203325 A203326 A203327

KEYWORD

nonn

AUTHOR

R. H. Hardin Dec 31 2011

STATUS

approved

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Last modified August 10 13:12 EDT 2022. Contains 356039 sequences. (Running on oeis4.)