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A201447
Number of nX4 0..3 arrays with every row and column nondecreasing rightwards and downwards, and the number of instances of each value within one of each other
2
1, 9, 29, 112, 261, 846, 1720, 4193, 8065, 16693, 29073, 55954, 90874, 158301, 249828, 409302, 611841, 962288, 1392970, 2091478, 2957586, 4286258, 5893598, 8347259, 11221370, 15440747, 20464931, 27577548, 35834857, 47497364, 60856456, 79217039
OFFSET
1,2
COMMENTS
Column 4 of A201451
LINKS
EXAMPLE
Some solutions for n=10
..0..0..0..0....0..0..0..0....0..0..0..1....0..0..0..0....0..0..0..1
..0..0..0..1....0..1..1..1....0..0..1..1....0..0..0..0....0..0..1..1
..0..1..1..1....0..1..1..1....0..0..1..1....0..0..2..2....0..1..2..3
..0..1..2..2....0..1..1..1....0..0..1..1....1..1..2..2....0..1..2..3
..0..2..2..2....0..1..2..3....0..1..1..1....1..1..2..3....0..1..2..3
..1..2..2..3....0..2..2..3....2..2..3..3....1..1..2..3....0..1..2..3
..1..2..2..3....0..2..2..3....2..2..3..3....1..1..2..3....0..1..2..3
..1..2..3..3....2..2..2..3....2..2..3..3....1..1..2..3....1..1..2..3
..1..3..3..3....2..3..3..3....2..2..3..3....2..3..3..3....2..2..2..3
..1..3..3..3....2..3..3..3....2..2..3..3....2..3..3..3....2..3..3..3
CROSSREFS
Sequence in context: A103535 A147268 A147376 * A288744 A183245 A101141
KEYWORD
nonn
AUTHOR
R. H. Hardin Dec 01 2011
STATUS
approved