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 A334848 #12 Jun 02 2025 14:45:21
%S A334848 1,3,3,6,4,8,9,3,2,2,0,5,5,5,2,5,8,2,3,0,1,2,9,5,0,2,3,2,5,0,6,0,1,9,
%T A334848 6,2,3,9,4,0,0,9,8,2,6,7,2,3,8,9,1,7,7,1,0,3,2,9,2,9,6,0,3,9,6,4,9,2,
%U A334848 5,8,5,4,1,9,0,4,6,5,6,9,6,0,8,0,2,5
%N A334848 Decimal expansion of circumference of x^2 + 9 y^2 = 9.
%F A334848 arclength = 4*E(-8), where E = complete elliptic integral.
%F A334848 Equals 2*A093728 = 4*A249491.
%e A334848 arclength = 13.3648932205552582301295023250601962394009826...
%t A334848 s = Integrate[Sqrt[D[ 3 Cos[t], t]^2 + D[Sin[t], t]^2], {t, 0, 2 Pi}]
%t A334848 r = N[s, 200]
%t A334848 RealDigits[r][[1]]
%Y A334848 Cf. A093728, A249491, A333202, A334849.
%K A334848 nonn,cons,easy
%O A334848 2,2
%A A334848 _Clark Kimberling_, Jun 15 2020