A162119 Number of n X n binary arrays with rows and columns, considered as graycode numbers, in strictly increasing order, and no more than 2 ones in any row or column

2, 4, 16, 67, 327, 1827, 11291, 76436, 560922, 4424644, 37272300, 333474298, 3154416275, 31423894296, 328562851763

Offset

1,1

Links

Table of n, a(n) for n=1..15.

Crossrefs

Sequence in context: A278913 A306979 A358032 * A213327 A192623 A155519

Adjacent sequences: A162116 A162117 A162118 * A162120 A162121 A162122

Keyword

nonn

Author

R. H. Hardin Jun 25 2009

Status

approved