A162062 Number of n X n symmetric binary arrays with rows, considered as graycode numbers, in nondecreasing order, and no more than 7 ones in any row or column

2, 6, 18, 100, 794, 11268, 264083, 10769600, 713951303, 72018421871, 10336964079379, 1993158443643362

Offset

1,1

Links

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

Crossrefs

Sequence in context: A162059 A162060 A162061 * A162063 A162064 A162056

Adjacent sequences: A162059 A162060 A162061 * A162063 A162064 A162065

Keyword

nonn

Author

R. H. Hardin Jun 25 2009

Status

approved