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A188451
Number of (3*n)Xn binary arrays with nonzero rows in decreasing order, no more than 3 ones in any row and exactly 3 ones in every column
0
0, 0, 5, 139, 4944, 244490, 15980350, 1330789145, 137418347276, 17218246261956
OFFSET
1,3
COMMENTS
Row 3 of A188449
EXAMPLE
All solutions for 9X3
..1..1..1....1..1..1....1..1..0....1..1..1....1..1..1
..1..0..1....1..1..0....1..0..1....1..1..0....1..1..0
..1..0..0....1..0..1....1..0..0....1..0..0....1..0..1
..0..1..1....0..1..0....0..1..1....0..1..1....0..1..1
..0..1..0....0..0..1....0..1..0....0..0..1....0..0..0
..0..0..0....0..0..0....0..0..1....0..0..0....0..0..0
..0..0..0....0..0..0....0..0..0....0..0..0....0..0..0
..0..0..0....0..0..0....0..0..0....0..0..0....0..0..0
..0..0..0....0..0..0....0..0..0....0..0..0....0..0..0
CROSSREFS
Sequence in context: A224826 A122911 A103235 * A362993 A061463 A279017
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 31 2011
STATUS
approved