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 A130203 #15 Feb 16 2025 08:33:06 %S A130203 7,0,6,0,5,3,4,0,9,3,8,9,8,5,2,1,1,9,8,1,9,3,6,9,5,6,0,7,0,7,1,3,3,1, %T A130203 5,2,7,2,3,8,0,6,6,6,3,2,5,7,7,3,4,7,0,6,4,8,6,5,2,2,5,5,9,4,5,3,6,4, %U A130203 9,2,3,7,8,5,0,0,8,4,3,5,8,9,9,9,6,6,4,8,1,3,5,5,8,8,8,4,4,0,7,8,6,1,3,0,3 %N A130203 Decimal expansion of the mean distance between two points picked at random in a half-disk. %H A130203 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/CircularSectorLinePicking.html">Circular Sector Line Picking</a>. %H A130203 <a href="/index/Tra#transcendental">Index entries for transcendental numbers</a>. %F A130203 Equals (64*(-23 + 12*Pi))/(135*Pi^2). %e A130203 0.70605340938985211981936956070713315272380666325773... %t A130203 RealDigits[64*(12*Pi-23)/(135*Pi^2), 10, 100][[1]] (* _Amiram Eldar_, Apr 14 2022 *) %o A130203 (PARI) 64*(12*Pi-23)/135/Pi^2 \\ _Charles R Greathouse IV_, Nov 26 2024 %Y A130203 Cf. A093070, A130204. %K A130203 nonn,cons %O A130203 0,1 %A A130203 _Eric W. Weisstein_, May 16 2007