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 A104761 #2 Oct 02 2013 15:47:26 %S A104761 38,818,8818,88887,888883,8888818,88888881,888888881,8888888858, %T A104761 88888888882,888888888886,8888888888878,88888888888883, %U A104761 888888888888881,8888888888888881,88888888888888883,888888888888888838 %N A104761 Smallest semiprime containing exactly n 8's. %e A104761 a(2)=818 because 818 is the smallest semiprime containing exactly two 8's. %K A104761 base,nonn %O A104761 1,1 %A A104761 _Shyam Sunder Gupta_, Apr 24 2005