A162041 Number of n X n symmetric binary arrays with rows, considered as binary numbers, in nondecreasing order, and no more than 7 ones in any row

2, 5, 17, 86, 698, 9551, 226592, 9245253, 609377754, 61373432252, 8692442796258, 1643301779040639

Offset

1,1

Links

Table of n, a(n) for n=1..12.

Crossrefs

Sequence in context: A162038 A162039 A162040 * A162042 A162043 A016121

Adjacent sequences: A162038 A162039 A162040 * A162042 A162043 A162044

Keyword

nonn

Author

R. H. Hardin Jun 25 2009

Status

approved