OFFSET
1,4
LINKS
Reinhard Zumkeller, Table of n, a(n) for n = 1..10000
MATHEMATICA
Reap[Do[f = FactorInteger[n]; If[n == 1, Sow[0], If[And @@ (# <= 2 & ) /@ f[[All, 2]], Sow[Total[n*(f[[All, 2]]/f[[All, 1]])]]]], {n, 1, 100}]][[2, 1]] (* Jean-François Alcover, May 16 2013 *)
PROG
(Haskell)
a157104 = a003415 . a004709 -- Reinhard Zumkeller, May 24 2013
CROSSREFS
KEYWORD
nonn
AUTHOR
Reinhard Zumkeller, Feb 23 2009
STATUS
approved