A162046 Number of n X n binary arrays with rows and columns, considered as binary numbers, in nondecreasing order, and no more than 4 ones in any row or column

2, 7, 45, 650, 19286, 1022736, 86202115, 10650429877, 1821110552009

Offset

1,1

Links

Table of n, a(n) for n=1..9.

Crossrefs

Sequence in context: A348880 A079491 A266908 * A162047 A162048 A162049

Adjacent sequences: A162043 A162044 A162045 * A162047 A162048 A162049

Keyword

nonn

Author

R. H. Hardin Jun 25 2009

Status

approved