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 A074187 #4 Dec 05 2013 19:55:34 %S A074187 1,1,4,16,100,676,4913,40000,362404,3625216,39904489,478996996, %T A074187 6226945921,87177877081,1307672296225,20922784184449,355687416544329, %U A074187 6402373660047556,121645099966283776,2432902006216007824 %N A074187 Largest power (>=2) <= n!. %e A074187 a(7) = 4913 = 17^3 < 5040=7! There is no perfect power between 4913 and 5040. %Y A074187 Cf. A074188. %Y A074187 Cf. A055226. It seems that a(n)=A055226(n)^2 for n>7. %K A074187 nonn %O A074187 1,3 %A A074187 _Amarnath Murthy_, Aug 31 2002 %E A074187 More terms from _Hugo Pfoertner_, Jul 20 2004