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 A179217 #4 Mar 31 2012 14:41:48 %S A179217 0,1,2,3,5,6,9,4,8,10,14,15,12,17,20,21,19,28,25,23,30,36,27,7,38,13, %T A179217 32,45,35,55,44,47,57,68,54,66,80,93,34,78,43,91,40,49,107,105,65,11, %U A179217 59,122,70,120,42,138,51,155,173,136,77,153,192,82,90,212,52,171,95,233,62 %N A179217 Inverse function to A095904. %C A179217 A permutation of all nonnegative integers. %H A179217 Will Nicholes, <a href="http://willnicholes.com/math/primesigmap.htm">Iterative mapping of prime signatures</a>. %Y A179217 Cf. A095904, A179216, A179218. %K A179217 nonn %O A179217 2,3 %A A179217 _Will Nicholes_, Jul 10 2010