OFFSET
1,1
LINKS
Reinhard Zumkeller, Table of n, a(n) for n = 1..10000
PROG
(PARI) rad(n)=vecprod(factor(n)[, 1])
a(n)=sigma(n*rad(n)+1) \\ Charles R Greathouse IV, Jul 09 2013
(Haskell)
a078318 = a000203 . a078310 -- Reinhard Zumkeller, Jul 23 2013
CROSSREFS
KEYWORD
nonn
AUTHOR
Reinhard Zumkeller, Nov 23 2002
STATUS
approved