A162071 Number of n X n binary arrays with rows and columns, considered as graycode numbers, in nondecreasing order, and no more than 7 ones in any row or column.

2, 8, 58, 926, 36676, 4001456, 1278335749, 1190923541656, 2971761054499895

Offset

1,1

Links

Table of n, a(n) for n=1..9.

Crossrefs

Sequence in context: A162068 A162069 A162070 * A162072 A162073 A162065

Adjacent sequences: A162068 A162069 A162070 * A162072 A162073 A162074

Keyword

nonn

Author

R. H. Hardin, Jun 25 2009

Status

approved