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A050536 Iterated triangular numbers. 2
8, 36, 666, 222111, 24666759216, 304224505122393846936, 46276274758482720006792605816457695217516 (list; graph; refs; listen; history; internal format)
OFFSET

0,1

FORMULA

a(n)=binomial(a(n-1)+1, 2), a(0)=8;

CROSSREFS

A000217.

Sequence in context: A181072 A058823 A203020 * A110215 A052387 A001780

Adjacent sequences:  A050533 A050534 A050535 * A050537 A050538 A050539

KEYWORD

easy,nice,nonn

AUTHOR

Klaus Strassburger (strass(AT)ddfi.uni-duesseldorf.de), Dec 29 1999

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Last modified February 14 17:10 EST 2012. Contains 205644 sequences.