A162045 Number of n X n binary arrays with rows and columns, considered as binary numbers, in nondecreasing order, and no more than 3 ones in any row or column

2, 7, 45, 435, 6219, 123016, 3178802, 102907436, 4049382855, 189346451256

Offset

1,1

Links

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

Crossrefs

Sequence in context: A223001 A066612 A098637 * A326878 A153549 A348880

Adjacent sequences: A162042 A162043 A162044 * A162046 A162047 A162048

Keyword

nonn

Author

R. H. Hardin Jun 25 2009

Status

approved