A162029 Number of n X n symmetric binary arrays with rows, considered as binary numbers, in nondecreasing order, and all but the outermost 3 rows or columns zero

9551, 122101, 1256503, 12051416, 106111585, 855398841, 6337419361, 43410988862, 276664746561, 1650144958374, 9259586796264, 49111519801837, 247214609643666, 1185294659260677, 5430232765621517, 23838156895188536, 100526122685395815

Offset

6,1

Links

R. H. Hardin, Table of n, a(n) for n=6..30

Crossrefs

Sequence in context: A353088 A232189 A271046 * A251909 A251906 A223367

Adjacent sequences: A162026 A162027 A162028 * A162030 A162031 A162032

Keyword

nonn

Author

R. H. Hardin Jun 25 2009

Status

approved