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 A140170 #2 Mar 30 2012 17:37:44 %S A140170 1,2,42,521,4624,347352 %N A140170 Numbers n such that n=s^pi(d_1)+s^pi(d_2)+...+s^pi(d_k) where s is sum of its digits and d_1d_2...d_k is the decimal expansion of n. %e A140170 4624=(4+6+2+4)^pi(4)+(4+6+2+4)^pi(6)+(4+6+2+4)^pi(2)+(4+6+2+4)^pi(4). %Y A140170 Cf. A140175. %K A140170 base,fini,full,nonn %O A140170 1,2 %A A140170 _Farideh Firoozbakht_, May 20 2008