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

1, 3, 39, 3217, 2181522, 14100262412, 990154499577167

Offset

1,2

Comments

Diagonal of A188416

Links

Table of n, a(n) for n=1..7.

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: A267624 A342178 A342166 * A188388 A076628 A198411

Adjacent sequences: A188407 A188408 A188409 * A188411 A188412 A188413

Keyword

nonn

Author

R. H. Hardin Mar 30 2011

Status

approved