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%I #3 Mar 30 2012 18:50:29
%S 2,5,3,2,2,17,2,2,2,31,3,2,37,43,2,2,2,3,3,5,2,2,73,2,2,2,89,7,2,101,
%T 2,113,2,2,127,2,3,2,3,5,2,2,2,7,2,2,3,2,3,5,3,2,197,2,2,2,7,2,223,3,
%U 2,2,233,241,2,2,257,2,2,5,269,2,283,17,2,2,3,2,2,3,5,2,337,2,347,2,3,2
%N Smallest prime factor of numbers which can be written as sum of a positive square and a positive cube.
%C a(n)=A020639(A055394(n)).
%Y Cf. A078376.
%K nonn
%O 1,1
%A _Reinhard Zumkeller_, Nov 25 2002
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