A162043 Number of n X n symmetric binary arrays with rows, considered as binary numbers, in nondecreasing order, and no more than 9 ones in any row

2, 5, 17, 86, 698, 9551, 226592, 9471845, 705154187, 93580638024, 21617123994739, 8359355039654246, 5068693922149271436

Offset

1,1

Links

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

Crossrefs

Sequence in context: A162040 A162041 A162042 * A016121 A216519 A245108

Adjacent sequences: A162040 A162041 A162042 * A162044 A162045 A162046

Keyword

nonn

Author

R. H. Hardin Jun 25 2009

Status

approved