A162068 Number of n X n binary arrays with rows and columns, considered as graycode numbers, in nondecreasing order, and no more than 4 ones in any row or column.

2, 8, 58, 926, 28689, 1605029, 143303526, 18742331821, 3381674439844

Offset

1,1

Links

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

Crossrefs

Sequence in context: A086907 A132186 A191603 * A162069 A162070 A162071

Adjacent sequences: A162065 A162066 A162067 * A162069 A162070 A162071

Keyword

nonn

Author

R. H. Hardin, Jun 25 2009

Status

approved