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 A335928 #5 Jul 01 2020 22:31:37
%S A335928 1,0,5,8,0,9,5,5,0,1,3,9,2,5,6,3,0,5,7,7,2,7,8,8,9,3,9,1,9,3,5,9,4,6,
%T A335928 8,8,7,7,4,8,4,9,0,4,9,9,7,7,9,6,9,1,9,3,0,5,6,0,6,4,4,6,2,4,4,1,1,6,
%U A335928 8,2,6,3,6,1,2,3,6,9,4,7,9,4,8,0,8,2
%N A335928 Decimal expansion of the arclength on y = sin(x) from (0,0) to (Pi/4,sqrt(2)).
%e A335928 arclength = 1.05809550139256305772788939193594688774...
%t A335928 r = NIntegrate[Sqrt[1 + Cos[t]^2], {t, 0, Pi/4}, WorkingPrecision -> 200]
%t A335928 RealDigits[r][[1]]
%Y A335928 Cf. A335929, A335930, A335931.
%K A335928 nonn,cons
%O A335928 1,3
%A A335928 _Clark Kimberling_, Jul 01 2020