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 A180464 #11 Mar 05 2014 15:10:06 %S A180464 1,0,0,0,0,180217597,6217507317,325975026477,15034820907837, %T A180464 919684211139697,31808042757482763,1463508270300620883, %U A180464 58746435953696315769,2709539295335742607689,138000408890542031957601,5718143312090439006662949,263735727094699893912217269 %N A180464 a(n) is the smallest number m such that sigma(m)=46^n, or 0 if m does not exist. %H A180464 Max Alekseyev, <a href="/A180464/b180464.txt">Table of n, a(n) for n = 0..100</a> %e A180464 a(5)=180217597=7*25745371 and sigma(180217597)=(2^3)*(2^2*23^5)=2^5*23^5 and 180217597 is the smallest such number. %Y A180464 Cf. A048251, A110077, A180265, A180460, A180461, A180462, A180463. %K A180464 nonn %O A180464 0,6 %A A180464 _Walter Kehowski_, Sep 06 2010 %E A180464 Terms a(15) onward from _Max Alekseyev_, Mar 03 2014