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A096662
Least nontrivial n-tuply triangular number.
0
3, 6, 21, 231, 26796, 359026206, 64449908476890321, 2076895351339769460477611370186681, 2156747150208372213435450937462082366919951682912789656986079991221
OFFSET
1,1
FORMULA
a(n)=A007501(n). [From R. J. Mathar, Sep 04 2008]
MATHEMATICA
f[n_] := n(n + 1)/2; Table[ Nest[f, 2, n], {n, 10}]
CROSSREFS
KEYWORD
nonn
AUTHOR
Robert G. Wilson v, Jul 02 2004
STATUS
approved