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 A104170 #9 Oct 02 2013 15:47:24 %S A104170 1,6,49,376,3294,29928,278411,2632758,25154060,241882509,2335807857, %T A104170 22635291815,219935518608 %N A104170 Number of Smith numbers below 10^n. %D A104170 S. S. Gupta, Smith Numbers, Mathematical Spectrum, 37 (2004/5), 27-29. %H A104170 S. S. Gupta, <a href="http://www.shyamsundergupta.com/smith.htm">Smith Numbers</a>. %e A104170 a(4)=376 because number of Smith number below 10^4 is 376. %Y A104170 Cf. A006753. %K A104170 nonn,base,hard,more %O A104170 1,2 %A A104170 _Shyam Sunder Gupta_, Mar 10 2005 %E A104170 a(11), a(12) from _Max Alekseyev_, Jan 20 2010 %E A104170 a(13) from _Max Alekseyev_, Oct 01 2010