A162099 Number of n X n symmetric binary arrays with rows, considered as binary numbers, in strictly increasing order, and no more than 9 ones in any row

2, 3, 9, 48, 438, 6774, 178263, 8064528, 635233629, 87635138366, 20775026454364, 8166374023036601, 5000658352116041964

Offset

1,1

Links

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

Crossrefs

Sequence in context: A162096 A162097 A162098 * A307069 A255739 A037389

Adjacent sequences: A162096 A162097 A162098 * A162100 A162101 A162102

Keyword

nonn

Author

R. H. Hardin Jun 25 2009

Status

approved