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%I #4 Mar 30 2012 17:34:57
%S 2,1,8,14,26,62,134,393,1257,4659,9314,27933,167073,334142,4677862,
%T 14033577,56134292,2133102298,11788191218,52541651594
%N Smallest k such that A002217(k)=n.
%C Least number which becomes prime or 0 or 4 after n-1 iterations of f(x) = sum of prime factors of x (cf. A001414). Agrees with A048133 except for the second term.
%C a(21) <= 536226160966. a(22) <= 2681130804805. a(23) <= 8512643845707. - Donovan Johnson
%Y Cf. A002217, A001414, A048133.
%K nonn
%O 1,1
%A _Klaus Brockhaus_, Jul 27 2006
%E Edited comment and a(19)-a(20) from _Donovan Johnson_, Oct 16 2010
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