A162101 Number of n X n binary arrays with rows and columns, considered as binary numbers, in strictly increasing order, and no more than 2 ones in any row or column

2, 3, 11, 44, 203, 1083, 6424, 41908, 297357, 2274237, 18618870, 162222857, 1496925971, 14568783883, 149016495539

Offset

1,1

Links

Table of n, a(n) for n=1..15.

Crossrefs

Sequence in context: A051081 A051093 A107327 * A128455 A260159 A287060

Adjacent sequences: A162098 A162099 A162100 * A162102 A162103 A162104

Keyword

nonn

Author

R. H. Hardin Jun 25 2009

Status

approved