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1,3
a(p) = p-1 for prime p.
a(n) = A001222(A130279(n))/2. - Reinhard Zumkeller, May 21 2007
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
Table of n, a(n) for n=1..82.
a(n) = Omega(A005179(n)), where Omega(n) = A001222(n).
s = { (* terms in A005179 *) }; f[n_] := Plus @@ Last /@ FactorInteger@n; f /@ s (* Robert G. Wilson v, Aug 31 2006 *)
Sequence in context: A113885 A113886 A220096 * A067240 A126080 A060681
Adjacent sequences: A122373 A122374 A122375 * A122377 A122378 A122379
nonn
Lekraj Beedassy, Aug 30 2006
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
approved