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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
OFFSET
1,1
COMMENTS
Column 2 of A203330
LINKS
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
KEYWORD
nonn
AUTHOR
R. H. Hardin Dec 31 2011
STATUS
approved