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 A179218 #2 Mar 31 2012 14:41:48 %S A179218 0,2,1,5,3,9,6,4,7,14,10,20,12,18,15,27,16,35,23,25,33,44,21,8,42,11, %T A179218 31,54,28,65,36,52,63,75,45,77,88,102,29,90,37,104,40,50,117,119,55, %U A179218 13,61,133,73,135,38,150,48,168,187,152,66,170,207,86,78,228,47,189,100,250 %N A179218 Inverse function to A179216. %C A179218 A permutation of all nonnegative integers. %H A179218 Will Nicholes, <a href="http://willnicholes.com/math/primesigmap.htm">Iterative mapping of prime signatures</a>. %Y A179218 Cf. A095904, A179216, A179217. %K A179218 nonn %O A179218 2,2 %A A179218 _Will Nicholes_, Jul 10 2010