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 A104809 #4 Oct 01 2016 16:59:48 %S A104809 556,604,665,906,2098,2760,2767,2798,2882,3397,3487,3561,3687,4789, %T A104809 4850,4954,5126,6015,6354,6677,6919,6964,7460,7466,7470,7740,7797, %U A104809 7894,8016,8088,8753,8817,9751,9805,9835,10003,10077,10645,10694,10728,10764 %N A104809 Positions of 9 in partition of decimal expansion of Pi A104807. %Y A104809 Cf. A104807-A104818. %K A104809 nonn,base %O A104809 1,1 %A A104809 _Zak Seidov_, Mar 27 2005