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 A181799 #5 Mar 30 2012 17:27:19 %S A181799 1,2,3,4,8,5,9,16,7,6,32,27,11,12,25,10,13,64,18,24,17,81,14,15,20,19, %T A181799 128,49,36,23,48,54,21,28,40,125,256,22,72,29,50,243,31,45,26,96,108, %U A181799 56,37,80,121,512,33,44,35,41,144,100,34,43,162,63,30,39,52,47,38,192,98,169 %N A181799 List of positive integers, ordered by asymptotic frequency of appearance in A003557; ties broken by listing smaller numbers first. %C A181799 A permutation of the natural numbers. %C A181799 The natural density of positive integers m such that A003557(m) = a(n) equals 6/(A181798(n)*Pi^2). If m is coprime to 6, 3m and 4m appear in A003557 equally often. %H A181799 Wikipedia, <a href="http://en.wikipedia.org/wiki/Natural_density">Natural density</a> %F A181799 The natural density of positive integers m such that A003557(m) = n equals 6/(A181797(n)*Pi^2). A181797(n) = n*A048250(n). %K A181799 nonn %O A181799 1,2 %A A181799 _Matthew Vandermast_, Dec 05 2010