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 A214898 #8 Jul 16 2015 22:19:23 %S A214898 2,827,607,239,191,5693,347 %N A214898 Conway's subprime Fibonacci sequence, largest loop elements. %C A214898 Similar to the Fibonacci recursion starting with a pair of positive integers, but each new nonprime term is divided by its least prime factor. Recursion enters a loop of length A214897(n), of which the largest element a(n) is prime (this sequence). %H A214898 Richard K. Guy, Tanya Khovanova and Julian Salazar, <a href="http://arxiv.org/abs/1207.5099">Conway's subprime Fibonacci sequences</a>, arXiv:1207.5099v1 [math.NT] %t A214898 see A214674 %Y A214898 Cf. A000045, A020639, A175723, A214551, A014682, A214674, A214892-A214898. %K A214898 nonn %O A214898 1,1 %A A214898 _Wouter Meeussen_, Jul 29 2012