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 A162218 #3 Mar 30 2012 17:28:42 %S A162218 1,2,8,17,1,65,131,512,259,2050,4100,1,16388,57346,65539,196610, %T A162218 458755,1,1572868,3670019,6291461,1,41943041,1,100663298,234881030, %U A162218 335544328,1207959557,2415919109,4831838216,5368709131,10737418246,34359738373 %N A162218 Greatest integer equal to the sum of the n-th powers of its base-3 digits (written in base 10). %H A162218 Joseph Myers, <a href="/A162218/b162218.txt">Table of n, a(n) for n=0..3158</a> %Y A162218 Cf. A162216, A162217, A033835. In other bases: A162221 (base 4), A162224 (base 5), A162227 (base 6), A162230 (base 7), A162233 (base 8), A162236 (base 9), A046761 (base 10). %K A162218 base,nonn %O A162218 0,2 %A A162218 _Joseph Myers_, Jun 28 2009