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%I #5 Mar 30 2012 18:50:48
%S 1,2,2,2,61,23,2,821,2,5,4201,2,2,2,137,7,2,270131,2,5,13,2,2,2,
%T 61277761,17,2,7,2,5,3373,2,2,2,113647,53,2,274359834731,2,5,109,2,2,
%U 2,19,23888027348153,7,34613,2,5,7,2,2,1091,919,86936981079782063,139,29
%N A020639(A004094(n)).
%e n=25 -> 2^25=33554432 -> 23445533=17*23*61*983: a(25)=17.
%Y Cf. A102382, A102383, A102385.
%K nonn
%O 0,2
%A _Reinhard Zumkeller_, Jan 06 2005
%E Corrected by _T. D. Noe_, Nov 15 2006
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