A048132 - OEIS

%I #5 Mar 30 2012 18:35:38

%S 9314,27849,30993,36398,46142,46405,55686,68653,69765,74416,74924,

%T 83718,84934,86662,86696,90177,92915,97533,97629,99895,101823,106538,

%U 111498,116182,116225,119005,119618,119874,122506,124414,124467,129236

%N Becomes prime or 4 after exactly 10 iterations of f(x) = sum of prime factors of x.

%C f(x) = sum of prime factors with multiplicity, so that f(1500) = 2+2+3+5+5+5 = 22.

%K nonn

%O 1,1

%A _David W. Wilson_