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 A175081 #2 Mar 30 2012 19:00:23 %S A175081 1,2,3,5,6,6,7,10,10,11,12,12,13,14,15,17,18,19,20,21,22,22,23,24,26, %T A175081 28,29,30,30,30,31,33,34,34,35,37,38,39,40,41,42,42,43,44,45,46,47,48, %U A175081 50,51,52,53,54,55,56,56,57,58,59,60,61,62,63,65,66,67,68,69,70,71,72,73 %N A175081 Values taken by the sum of perfect divisors of n (A175067) sorted into ascending order. %C A175081 Perfect divisor of n is divisor d such that d^k = n for some k >= 1. See A089723 (number of perfect divisors of n) and A175067 (sum of perfect divisors of n). %K A175081 nonn %O A175081 1,2 %A A175081 _Jaroslav Krizek_, Jan 24 2010