A162126 Number of n X n binary arrays with rows and columns, considered as graycode numbers, in strictly increasing order, and no more than 9 ones in any row or column

2, 4, 25, 408, 18003, 2289232, 851979730, 942937083934, 3167530249345690, 32647456893467395175

Offset

1,1

Links

Table of n, a(n) for n=1..10.

Crossrefs

Sequence in context: A162123 A162124 A162125 * A162118 A128774 A218258

Adjacent sequences: A162123 A162124 A162125 * A162127 A162128 A162129

Keyword

nonn

Author

R. H. Hardin Jun 25 2009

Status

approved