login
A188418
Number of (3*n)Xn binary arrays with rows in nonincreasing order, 3 ones in every column and no more than 3 ones in any row
0
1, 4, 39, 723, 21965, 968230, 57967660, 4505774905, 439923593145, 52601045792520
OFFSET
1,2
COMMENTS
Row 3 of A188416
EXAMPLE
All solutions for 6X2
..1..0....1..1....1..1....1..1
..1..0....1..1....1..0....1..1
..1..0....1..0....1..0....1..1
..0..1....0..1....0..1....0..0
..0..1....0..0....0..1....0..0
..0..1....0..0....0..0....0..0
CROSSREFS
Sequence in context: A132612 A129463 A299426 * A136653 A165434 A348118
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 30 2011
STATUS
approved