A162040 Number of n X n symmetric binary arrays with rows, considered as binary numbers, in nondecreasing order, and no more than 6 ones in any row

2, 5, 17, 86, 698, 9551, 217041, 7494325, 373961481, 24759614016, 2084532681440, 216682611479515, 27184833539127138

Offset

1,1

Links

Table of n, a(n) for n=1..13.

Crossrefs

Sequence in context: A079805 A162038 A162039 * A162041 A162042 A162043

Adjacent sequences: A162037 A162038 A162039 * A162041 A162042 A162043

Keyword

nonn

Author

R. H. Hardin Jun 25 2009

Status

approved