A085729 - OEIS

%I #3 Mar 30 2012 18:50:37

%S 0,2,3,4,5,7,6,6,11,13,8,17,19,23,10,9,29,31,10,37,41,43,47,14,53,59,

%T 61,12,67,71,73,79,12,83,89,97,101,103,107,109,113,22,15,127,14,131,

%U 137,139,149,151,157,163,167,26,173,179,181,191,193,197,199,211,223

%N Sum of prime factors of prime powers.

%C a(n) = A001414(A000961(n)).

%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/PrimePower.html">Prime Power</a>.

%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/SumofPrimeFactors.html">Sum of Prime Factors.</a>

%F a(p^e) = e*p: a(n)=A025474(n)*A025473(n).

%K nonn

%O 1,2

%A _Reinhard Zumkeller_, Jul 20 2003