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%I #5 Mar 30 2012 18:35:38
%S 1774,2566,3548,4497,5132,6382,6843,7096,7538,8043,8882,8902,9003,
%T 9286,10264,10334,10862,10997,11019,11162,11469,11490,12009,12226,
%U 12442,12507,12764,12817,12842,13215,13491,13849,13947,14192,14642,14677
%N Becomes prime after exactly 7 iterations of f(x) = sum of prime factors of x.
%C f(x) = sum of prime factors without multiplicity, so that f(1500) = 2+3+5 = 10.
%K nonn
%O 1,1
%A _David W. Wilson_
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