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 A178557 #2 Mar 31 2012 10:26:16 %S A178557 888888883,888888887,8488888883,8688888889,8838888881,8868888887, %T A178557 8880888883,8885888881,8886888889,8888088889,8888488883,8888808881, %U A178557 8888818889,8888838887,8888848889,8888868881,8888868889,8888880881 %N A178557 Primes with exactly eight 8's. %Y A178557 Cf. A038618, A178550-6, A178558 %K A178557 nonn,base %O A178557 1,1 %A A178557 _Lekraj Beedassy_, May 29 2010