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A162038 Number of n X n symmetric binary arrays with rows, considered as binary numbers, in nondecreasing order, and no more than 4 ones in any row 0
2, 5, 17, 86, 612, 5468, 62853, 856193, 13518083, 243899329, 4944615404, 111381110541, 2765327931184, 75061918010044 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..14.

CROSSREFS

Sequence in context: A144259 A191799 A079805 * A162039 A162040 A162041

Adjacent sequences:  A162035 A162036 A162037 * A162039 A162040 A162041

KEYWORD

nonn

AUTHOR

R. H. Hardin Jun 25 2009

STATUS

approved

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Last modified August 25 03:03 EDT 2019. Contains 326318 sequences. (Running on oeis4.)