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 A127549 #11 Jul 29 2017 10:03:07
%S A127549 1,3,1,3,0,3,6,7,3,6,4,3,3,5,8,2,9,0,6,3,8,3,9,5,1,6,0,2,6,4,1,7,8,2,
%T A127549 4,7,6,3,9,6,6,8,9,7,7,1,8,0,3,2,5,6,3,4,0,2,1,0,1,2,4,4,4,2,1,4,4,5,
%U A127549 6,4,7,3,1,7,7,6,2,7,2,2,4,3,6,9,5,3,2,2,0,1,7,2,3,8,3,2,8,1,7,4,5,3
%N A127549 Decimal expansion of the number 1.31303673643358290638395160264... having continued fraction expansion 1, 3, 5, 7, 11, 13, 17, 19, ...
%e A127549 1.3130367364335829063839516026417824763966897718032563402101244421445...
%t A127549 a = {1}; Do[AppendTo[a, Prime[n]], {n, 2, 100}]; RealDigits[N[FromContinuedFraction[a], 100]][[1]]
%t A127549 RealDigits[FromContinuedFraction[Join[{1},Prime[Range[2,5000]]]],10,100][[1]] (* _Harvey P. Dale_, Jul 27 2017 *)
%Y A127549 Cf. A064442.
%K A127549 nonn,cons,easy,less
%O A127549 1,2
%A A127549 _Artur Jasinski_, Jan 18 2007
%E A127549 One digit corrected by _Harvey P. Dale_, Jul 27 2017