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 A334849 #8 Jun 02 2025 14:20:27
%S A334849 1,5,8,6,5,4,3,9,5,8,9,2,9,0,5,8,9,7,9,1,3,3,1,6,6,3,0,2,7,7,8,3,0,7,
%T A334849 2,4,9,6,7,3,0,0,8,2,8,4,8,3,2,6,5,0,0,6,8,9,6,6,7,2,6,3,1,1,7,7,4,2,
%U A334849 4,8,2,2,3,9,1,0,9,6,8,8,9,9,5,9,1,4
%N A334849 Decimal expansion of circumference of 4 x^2 + 9 y^2 = 36.
%F A334849 arclength = 8 E(-5/4), where E = complete elliptic integral.
%e A334849 arclength = 15.8654395892905897913316630277830724967300828483...
%t A334849 s = Integrate[Sqrt[D[ 3 Cos[t], t]^2 + D[2 Sin[t], t]^2], {t, 0, 2 Pi}]
%t A334849 r = N[s, 200]
%t A334849 RealDigits[r][[1]]
%Y A334849 Cf. A333202, A334848.
%K A334849 nonn,cons,easy
%O A334849 2,2
%A A334849 _Clark Kimberling_, Jun 15 2020