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 A105320 #7 Aug 20 2017 11:46:57
%S A105320 31,41,59,26,53,58,97,93,23,84,62,64,33,83,27,95,2,88,41,97,16,93,99,
%T A105320 37,51,5,82,9,74,94,45,92,30,78,16,40,62,86,20,89,98,62,80,34,82,53,
%U A105320 42,11,70,67,98,21,48,8,65,13,28,23,6,64,70,93,84,46,9,55,5,82,23,17,25,35,94
%N A105320 Digital expansion of Pi: numbers from each pair of successive digits.
%t A105320 Table[FromDigits[Partition[RealDigits[N[Pi, 200]][[1]], 2][[i]]], {i, 100}]
%Y A105320 Cf. A000796.
%K A105320 nonn,base
%O A105320 1,1
%A A105320 _Zak Seidov_, Apr 30 2005