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 A301865 #18 Jun 01 2025 04:52:56 %S A301865 9,0,4,9,8,6,4,7,8,9,4,5,8,7,4,9,8,0,6,3,6,3,6,9,4,4,9,6,4,4,6,9,8,8, %T A301865 4,0,9,4,2,5,9,7,1,8,8,5,6,7,6,6,8,7,3,7,0,6,9,7,9,1,3,1,4,4,4,2,2,2, %U A301865 6,9,7,4,6,7,6,7,2,2,1,1,2,6,0,0,7,0,5 %N A301865 Decimal expansion of the probability that 2 planes, each passes through 3 random points inside a sphere, will intersect within the sphere. %C A301865 The problem was proposed and solved by Enoch Beery Seitz in 1883. %D A301865 Stanley Rabinowitz, Problems and Solutions from the Mathematical Visitor 1877-1896, MathPro Press, 1991, pp. 173-174. %H A301865 Enoch Beery Seitz, <a href="https://babel.hathitrust.org/cgi/pt?id=umn.31951000241746i;view=1up;seq=68">Problem 215</a>, The Mathematical Visitor, Vol. 2, No. 3 (1883), p. 58-59. %F A301865 Equals (63/64)^4*(5*Pi/16)^2. %e A301865 0.90498647894587498063636944964469884094259718856766... %t A301865 RealDigits[(63/64)^4*(5*Pi/16)^2, 10, 100][[1]] %o A301865 (PARI) (63/64)^4*(5*Pi/16)^2 \\ _Altug Alkan_, Mar 28 2018 %Y A301865 Cf. A301862, A301863, A301864. %K A301865 nonn,cons %O A301865 0,1 %A A301865 _Amiram Eldar_, Mar 28 2018 %E A301865 Offset corrected by _Artur Jasinski_, Jun 01 2025