A162039 Number of n X n symmetric binary arrays with rows, considered as binary numbers, in nondecreasing order, and no more than 5 ones in any row

2, 5, 17, 86, 698, 8853, 157014, 3797408, 115090450, 4234205332, 185001672488, 9420876404098, 550756524966710

Offset

1,1

Links

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

Crossrefs

Sequence in context: A191799 A079805 A162038 * A162040 A162041 A162042

Adjacent sequences: A162036 A162037 A162038 * A162040 A162041 A162042

Keyword

nonn

Author

R. H. Hardin Jun 25 2009

Status

approved