A162044 Number of n X n binary arrays with rows and columns, considered as binary numbers, in nondecreasing order, and no more than 2 ones in any row or column

2, 7, 24, 98, 461, 2458, 14613, 95461, 677729, 5184135, 42428781, 369422957, 3405529609, 33103337716, 338110552799

Offset

1,1

Links

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

Crossrefs

Sequence in context: A150433 A197554 A325581 * A150434 A150435 A150436

Adjacent sequences: A162041 A162042 A162043 * A162045 A162046 A162047

Keyword

nonn

Author

R. H. Hardin Jun 25 2009

Status

approved