A162030 Number of n X n symmetric binary arrays with rows, considered as binary numbers, in nondecreasing order, and all but the outermost 4 rows or columns zero

9471845, 370995866, 12256154479, 374124492162, 10495488465847, 271028317656933, 6466996667053452, 143211168475701734, 2956378703615485863, 57132980396982387053, 1037683143643901254026, 17777210671425885378565

Offset

8,1

Links

R. H. Hardin, Table of n, a(n) for n=8..23

Crossrefs

Sequence in context: A274042 A066703 A270994 * A184570 A124515 A075009

Adjacent sequences: A162027 A162028 A162029 * A162031 A162032 A162033

Keyword

nonn

Author

R. H. Hardin Jun 25 2009

Status

approved