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 A335932 #4 Jul 04 2020 01:45:16
%S A335932 8,5,2,0,0,3,3,9,3,1,2,1,2,9,2,9,5,1,2,2,4,4,9,1,6,4,9,1,4,9,7,7,4,7,
%T A335932 5,8,2,0,6,4,9,3,3,0,7,5,4,3,9,4,5,4,2,9,9,7,9,6,0,3,7,0,3,9,6,1,9,1,
%U A335932 5,2,6,4,4,8,3,4,7,0,1,6,5,7,2,4,8,6
%N A335932 Decimal expansion of arclength on y = cos(x) from (0,1) to (Pi/4,sqrt(1/2)).
%C A335932 This arclength is also the arclength on y = sin(x) from (Pi/4,sqrt(1/2)) to (Pi/2,1).
%e A335932 arclength = 0.85200339312129295122449164914977475820649330754394...
%t A335932 r = NIntegrate[Sqrt[1 + Sin[t]^2], {t, 0, Pi/4}, WorkingPrecision -> 200]
%t A335932 RealDigits[r][[1]]
%Y A335932 Cf. A335928, A335929, A335930, A335931.
%K A335932 nonn,cons
%O A335932 0,1
%A A335932 _Clark Kimberling_, Jul 03 2020