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 A332628 #7 Jun 14 2020 22:48:29
%S A332628 2,0,2,9,8,2,8,1,8,1,4,3,9,2,2,6,9,6,7,1,0,3,3,3,0,5,1,6,2,6,6,9,1,6,
%T A332628 6,3,4,0,9,4,0,1,2,6,9,9,5,6,9,8,4,2,6,4,6,2,6,7,2,2,9,4,7,1,8,4,3,1,
%U A332628 7,1,0,2,7,9,9,3,0,7,7,8,6,2,8,4,0,8
%N A332628 Decimal expansion of arclength between inflection points of standard normal density function.
%C A332628 The inflection points are (-1,1) and (1,1), corresponding to one standard deviation.
%e A332628 arclength = 2.02982818143922696710333051626691663409401269956...
%t A332628 s = Integrate[Sqrt[1 + (E^-x^2 x^2)/(2 Pi)], {x, -1, 1}]
%t A332628 r = N[s, 200]
%t A332628 RealDigits[r][[1]]
%o A332628 (PARI) intnum(x=-1, 1, sqrt(1+exp(-x^2)*x^2/(2*Pi))) \\ _Michel Marcus_, May 13 2020
%Y A332628 Cf. A333205.
%K A332628 nonn,cons,easy
%O A332628 1,1
%A A332628 _Clark Kimberling_, May 13 2020