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A188410
Number of (n^2)Xn binary arrays with rows in nonincreasing order, n ones in every column and no more than 3 ones in any row
0
1, 3, 39, 3217, 2181522, 14100262412, 990154499577167
OFFSET
1,2
COMMENTS
Diagonal of A188416
EXAMPLE
All solutions for 4X2
..1..1....1..1....1..0
..1..0....1..1....1..0
..0..1....0..0....0..1
..0..0....0..0....0..1
CROSSREFS
Sequence in context: A342178 A376162 A342166 * A188388 A076628 A198411
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 30 2011
STATUS
approved