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 A029914 #13 Mar 08 2020 23:54:05 %S A029914 17,59,17,31,13 %N A029914 Start with n; repeatedly sum squares of prime factors (counted with multiplicity), until reach a prime p, then set a(n) = p; if reach a fixed point q, set a(n) = q; set a(n) = 0 if no limit exists. %e A029914 2 -> 2^2 = 4 -> 2^2 + 2^2 = 8 -> 2^2 + 2^2 + 2^12 = 12 -> 2^2 + 2^2 + 3^2 = 17, prime, so stop; a(2)=17. %Y A029914 Cf. A029913. %K A029914 nonn,more %O A029914 2,1 %A A029914 _Dann Toliver_ %E A029914 More terms from _Michel ten Voorde_, Apr 12 2001 %E A029914 Incorrect extension reverted by _Sean A. Irvine_, Mar 08 2020