A162060 Number of n X n symmetric binary arrays with rows, considered as graycode numbers, in nondecreasing order, and no more than 5 ones in any row or column

2, 6, 18, 100, 794, 10414, 190428, 4659387, 143848365, 5430367157, 242216815664, 12631766954130, 754181337363809

Offset

1,1

Links

Table of n, a(n) for n=1..13.

Crossrefs

Sequence in context: A052687 A302546 A162059 * A162061 A162062 A162063

Adjacent sequences: A162057 A162058 A162059 * A162061 A162062 A162063

Keyword

nonn

Author

R. H. Hardin Jun 25 2009

Status

approved