OFFSET
1,2
COMMENTS
LINKS
Ivan Neretin, Table of n, a(n) for n = 1..10000
MATHEMATICA
Fold[Append[#1, DivisorSigma[0, #1[[-1]]*#2]] &, {1}, Range[2, 74]] (* Ivan Neretin, Sep 01 2016 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Reinhard Zumkeller, May 24 2006
STATUS
approved