A188413 Number of (6*n) X 6 binary arrays with rows in nonincreasing order, n ones in every column and no more than 3 ones in any row.

166, 17443, 968230, 33313408, 793369090, 14100262412, 197263686098, 2259540285524, 21835069296894, 182229535192536

Offset

1,1

Comments

Column 6 of A188416.

Links

Table of n, a(n) for n=1..10.

Example

Some solutions for 12 X 6
..1..1..0..0..0..0....1..0..0..0..0..0....1..1..0..0..0..0....1..0..0..0..0..0
..1..0..0..1..1..0....1..0..0..0..0..0....1..0..0..0..0..0....1..0..0..0..0..0
..0..1..1..0..0..0....0..1..1..0..1..0....0..1..0..1..0..1....0..1..0..0..0..1
..0..0..1..0..0..0....0..1..0..1..0..1....0..0..1..0..1..1....0..1..0..0..0..0
..0..0..0..1..0..1....0..0..1..0..1..0....0..0..1..0..1..0....0..0..1..1..0..0
..0..0..0..0..1..0....0..0..0..1..0..0....0..0..0..1..0..0....0..0..1..0..1..0
..0..0..0..0..0..1....0..0..0..0..0..1....0..0..0..0..0..0....0..0..0..1..0..1
..0..0..0..0..0..0....0..0..0..0..0..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..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

Cf. A188416.

Sequence in context: A144380 A204963 A011815 * A144929 A281934 A212325

Adjacent sequences: A188410 A188411 A188412 * A188414 A188415 A188416

Keyword

nonn

Author

R. H. Hardin, Mar 30 2011

Status

approved