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 A104815 #4 Oct 01 2016 17:02:16 %S A104815 1,5,7,33,35,44,47,49,50,52,62,93,98,104,105,113,120,121,122,127,128, %T A104815 129,130,138,159,166,170,171,174,188,209,216,222,226,227,230,242,244, %U A104815 246,250,251,253,261,266,273,277,280,282,293,299 %N A104815 Positions of 3 in partition of decimal expansion of Pi A104807. %Y A104815 Cf. A104807-A104818. %K A104815 nonn,base %O A104815 1,2 %A A104815 _Zak Seidov_, Mar 27 2005