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 A179222 #2 Mar 31 2012 14:41:48 %S A179222 1,4,9,7,10,12,14,11,27,17,125,208,4489,42588 %N A179222 Iterative mapping: a(1)=1, a(n)=A179216(a(n-1)). %C A179222 a(15) is greater than 10^7 and of the form (p^5)(q^5)(r^2) where p, q and r are distinct primes. %H A179222 Will Nicholes, <a href="http://willnicholes.com/math/primesigmap.htm">Iterative mapping of prime signatures</a>. %Y A179222 Cf. A179216, A179221. %K A179222 nonn %O A179222 1,2 %A A179222 _Will Nicholes_, Jul 10 2010