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 A048127 #5 Mar 30 2012 18:35:38 %S A048127 62,69,74,94,106,116,123,133,169,178,188,190,201,206,228,238,244,254, %T A048127 259,267,286,291,292,305,321,327,340,344,365,366,370,381,387,395,403, %U A048127 404,408,411,413,438,444,446,453,459,465,471,472,474,482,483,484,496 %N A048127 Becomes prime or 4 after exactly 5 iterations of f(x) = sum of prime factors of x. %C A048127 f(x) = sum of prime factors with multiplicity, so that f(1500) = 2+2+3+5+5+5 = 22. %K A048127 nonn %O A048127 1,1 %A A048127 _David W. Wilson_