A162097 Number of n X n symmetric binary arrays with rows, considered as binary numbers, in strictly increasing order, and no more than 7 ones in any row

2, 3, 9, 48, 438, 6774, 178263, 7892642, 552311584, 57812454817, 8380744532243, 1606232837538784

Offset

1,1

Links

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

Crossrefs

Sequence in context: A162094 A162095 A162096 * A162098 A162099 A307069

Adjacent sequences: A162094 A162095 A162096 * A162098 A162099 A162100

Keyword

nonn

Author

R. H. Hardin Jun 25 2009

Status

approved