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 A332630 #4 Jun 14 2020 22:48:49
%S A332630 1,4,2,1,1,6,2,4,3,7,4,3,5,2,4,5,1,8,7,7,2,7,4,6,5,5,3,6,7,9,7,2,6,1,
%T A332630 2,9,3,0,1,3,3,9,7,8,9,5,3,4,5,7,3,9,8,6,3,0,1,4,1,0,2,2,9,0,0,4,7,9,
%U A332630 8,2,5,3,3,0,0,8,6,3,7,3,7,3,5,0,6,0
%N A332630 Decimal expansion of arclength between (0,1) and (1,2) on y = 2^x.
%e A332630 arclength = 1.42116243743524518772746553679726129301339...
%t A332630 s = Integrate[Sqrt[1 + D[2^x,x]^2], {x, 0, 1}]
%t A332630 r = N[s, 200]
%t A332630 RealDigits[r][[1]]
%Y A332630 Cf. A333202, A332629.
%K A332630 nonn,cons,easy
%O A332630 1,2
%A A332630 _Clark Kimberling_, Jun 12 2020