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Squarefree kernels of numbers which can be written as sum of a positive square and a positive cube.
2

%I #4 Mar 30 2012 18:50:29

%S 2,5,3,10,6,17,6,26,14,31,33,6,37,43,22,10,26,57,21,65,34,6,73,38,10,

%T 82,89,91,10,101,6,113,122,42,127,2,129,134,141,145,74,30,38,161,82,

%U 170,57,174,177,185,21,14,197,102,206,26,217,110,223,15,226,58,233,241

%N Squarefree kernels of numbers which can be written as sum of a positive square and a positive cube.

%C a(n)=A007947(A055394(n)).

%e 3^2+3^3 = A055394(11) = 36, a(12) = A007947(A055394(11)) = A007947(36) = A007947(2^2*3^2) = 2*3 = 6.

%Y Cf. A078387.

%K nonn

%O 1,1

%A _Reinhard Zumkeller_, Nov 25 2002