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 A180265 #13 Mar 05 2014 15:39:13 %S A180265 1,13,0,1164,15132,230484,2823492,36705396,508541124,7194470556, %T A180265 100696385244,1503091145388,19540184890044,273550891167372, %U A180265 3811871194625676,53378900339114532,727176010568075796,10177815744800162004,142523339476298463228,1994910930816765350844,27918212600229725023068 %N A180265 a(n) = smallest k such that sigma(k) = 14^n, or zero if no such k exists. %H A180265 Max Alekseyev, <a href="/A180265/b180265.txt">Table of n, a(n) for n = 0..100</a> %e A180265 a(0)=1 since sigma(1)=14^0=1. a(1)=13 since sigma(13)=14. a(2)=0 since no N exists such that sigma(N)=14^2. a(6)=2823492=2^2*3*7*33613 since sigma(2823492)=14^6 is the first 6th power. a(7)=36705396=2^2*3*7*13*33613 since sigma(36705396)=14^7 is the first 7th power. %Y A180265 Cf. A046528, A048251, A110077, A180460, A180461, A180462, A180463, A180464 %K A180265 nonn %O A180265 0,2 %A A180265 _Walter Kehowski_, Aug 22 2010 %E A180265 Edited (including b-file) by _N. J. A. Sloane_, Oct 05 2010 %E A180265 Terms a(25) onward from _Max Alekseyev_, Mar 04 2014