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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 1
9551, 122101, 1256503, 12051416, 106111585, 855398841, 6337419361, 43410988862, 276664746561, 1650144958374, 9259586796264, 49111519801837, 247214609643666, 1185294659260677, 5430232765621517, 23838156895188536, 100526122685395815 (list; graph; refs; listen; history; text; internal format)
OFFSET

6,1

LINKS

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

CROSSREFS

Sequence in context: A134117 A232189 A271046 * A251909 A251906 A223367

Adjacent sequences:  A162026 A162027 A162028 * A162030 A162031 A162032

KEYWORD

nonn

AUTHOR

R. H. Hardin Jun 25 2009

STATUS

approved

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Last modified January 24 04:47 EST 2022. Contains 350534 sequences. (Running on oeis4.)