OFFSET
1,3
COMMENTS
This function is not additive; the smallest counterexample is a(40) = 7 != 4 + 4 = a(5) + a(8). - Franklin T. Adams-Watters Jul 10 2009
LINKS
David A. Corneth, Table of n, a(n) for n = 1..10000 (first 2000 terms from Amiram Eldar)
FORMULA
a(p) = p-1 for prime p.
MATHEMATICA
s = { (* terms in A005179 *) }; f[n_] := Plus @@ Last /@ FactorInteger@n; f /@ s (* Robert G. Wilson v, Aug 31 2006 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Lekraj Beedassy, Aug 30 2006
EXTENSIONS
More terms from Robert G. Wilson v, Aug 31 2006
Edited and extended by Ray Chandler, Sep 11 2006
Incorrect comment removed by Franklin T. Adams-Watters, Jul 11 2009
STATUS
approved