This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A048132 #5 Mar 30 2012 18:35:38 %S A048132 9314,27849,30993,36398,46142,46405,55686,68653,69765,74416,74924, %T A048132 83718,84934,86662,86696,90177,92915,97533,97629,99895,101823,106538, %U A048132 111498,116182,116225,119005,119618,119874,122506,124414,124467,129236 %N A048132 Becomes prime or 4 after exactly 10 iterations of f(x) = sum of prime factors of x. %C A048132 f(x) = sum of prime factors with multiplicity, so that f(1500) = 2+2+3+5+5+5 = 22. %K A048132 nonn %O A048132 1,1 %A A048132 _David W. Wilson_