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 A179228 #2 Mar 31 2012 14:41:48 %S A179228 49632504515,1530323,277884,2661,7380,403,172,61,88,63,50,56,29,17,16, %T A179228 11,7,5,6,9,10,25,20,15,49,66,841,328509,528490692608 %N A179228 Iterative mapping with offset: a(1)=49632504515, a(n)=A179216(a(n-1)-2). %C A179228 a(30) is greater than 10^22. Of the sequences of type a(n)=A179216(a(n-1)-2), this contains the smallest integer (5) that is part of an unknown sequence type (i.e. it is unknown if this sequence continues indefinitely in both directions or is part of a loop.) %H A179228 Will Nicholes, <a href="http://willnicholes.com/math/primesigmap.htm">Iterative mapping of prime signatures</a>. %Y A179228 Cf. A179216, A179227. %K A179228 nonn %O A179228 1,1 %A A179228 _Will Nicholes_, Jul 10 2010