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 A029911 #4 Oct 12 2013 15:29:00 %S A029911 1,5,6,7,7,7,7,7,7,7,7,7,11,7,7,11,7,7,7,11,11,7,7,13,11,7,17,7,13,7, %T A029911 7,7,7,7,13,11,7,7,17,7,23,11,13,7,7,13,19,17,7,7,7,13,7,7,7,19,19,7, %U A029911 13,7,7,23,7,7,7,7,11,7,13,13,11,7,17,7,7,23,7,7,7,7,19,41,7 %N A029911 Start with n; if prime, skip; repeatedly sum prime factors (counted with multiplicity) and add 1, until reach 1, 6 or a prime. %e A029911 20 -> 2+2+5+1 = 10 -> 2+5+1 = 8 -> 2+2+2+1 = 7. %Y A029911 Cf. A029910. %K A029911 nonn %O A029911 1,2 %A A029911 _Dann Toliver_