A162123 Number of n X n binary arrays with rows and columns, considered as graycode numbers, in strictly increasing order, and no more than 6 ones in any row or column

2, 4, 25, 408, 18003, 2289232, 797371541, 652750415070, 1065697211064947

Offset

1,1

Links

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

Crossrefs

Sequence in context: A162120 A162121 A162122 * A162124 A162125 A162126

Adjacent sequences: A162120 A162121 A162122 * A162124 A162125 A162126

Keyword

nonn

Author

R. H. Hardin Jun 25 2009

Status

approved