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 A301863 #10 Apr 09 2018 10:07:26 %S A301863 6,7,8,1,0,6,8,0,5,4,4,9,6,2,1,5,8,3,3,8,5,4,2,3,1,7,3,4,2,1,9,8,9,8, %T A301863 8,2,3,8,2,8,8,7,4,9,7,1,4,8,6,1,6,7,2,8,7,1,0,7,5,2,9,5,5,7,5,1,0,0, %U A301863 5,7,5,8,8,2,9,8,2,8,9,3,1,8,3,1,1,9,8 %N A301863 Decimal expansion of the probability of intersection of 2 random chords in a circle, where each chord is selected by 2 random points within the circle. %H A301863 Herbert Solomon, <a href="https://archive.org/stream/GeometricProbability/Geometric_Probability-Solomon#page/n161/mode/2up">Geometric Probability</a>, SIAM, 1978, p. 153. %F A301863 1/3 + 245/(72*Pi^2) %e A301863 0.67810680544962158338542317342198988238288749714861... %t A301863 RealDigits[1/3 + 245/(72*Pi^2), 10, 100][[1]] %o A301863 (PARI) 1/3 + 245/(72*Pi^2) \\ _Altug Alkan_, Mar 28 2018 %Y A301863 Cf. A301862, A301864, A301865. %K A301863 nonn,cons %O A301863 1,1 %A A301863 _Amiram Eldar_, Mar 28 2018