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 A332632 #4 Jun 14 2020 22:49:27
%S A332632 1,1,2,1,5,5,3,1,8,2,4,0,0,7,3,6,0,3,1,2,0,8,1,8,5,7,1,7,1,4,4,7,9,3,
%T A332632 7,5,2,6,2,4,5,2,5,5,1,6,6,7,0,5,0,8,8,5,4,7,8,5,0,2,3,3,8,8,2,7,9,0,
%U A332632 1,5,9,7,1,7,7,5,6,0,8,4,0,6,4,5,2,3
%N A332632 Decimal expansion of arclength between (0,1) and (1,1/2) on y = 1/2^x.
%e A332632 arclength = 1.1215531824007360312081857171447937526245255166...
%t A332632 s = Integrate[Sqrt[1 + D[2^(-x), x]^2], {x, 0, 1}]
%t A332632 r = N[s, 200]
%t A332632 RealDigits[r][[1]]
%Y A332632 Cf. A333202, A332630.
%K A332632 nonn,cons,easy
%O A332632 1,3
%A A332632 _Clark Kimberling_, Jun 12 2020