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Sum of all prime factors of numbers which can be written as sum of a positive square and a positive cube.
2

%I #3 Mar 30 2012 18:50:29

%S 2,5,6,7,7,17,9,15,11,31,14,10,37,43,15,12,17,22,13,18,21,12,73,23,13,

%T 43,89,20,14,101,13,113,63,15,127,14,46,69,50,34,41,15,25,30,45,24,25,

%U 34,62,42,16,18,197,24,105,21,38,20,223,16,115,35,233,241,46,17,257,22

%N Sum of all prime factors of numbers which can be written as sum of a positive square and a positive cube.

%C a(n)=A001414(A055394(n)).

%Y Cf. A078383, A078382, A078378.

%K nonn

%O 1,1

%A _Reinhard Zumkeller_, Nov 25 2002