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 A363437 #8 Feb 07 2025 13:43:24 %S A363437 5,1,3,2,0,0,2,3,9,2,7,9,6,6,7,3,4,6,2,3,0,3,5,4,4,7,1,5,5,7,2,9,5,5, %T A363437 1,6,1,3,1,2,0,1,5,5,6,6,8,4,5,5,7,2,2,3,1,2,7,6,4,6,5,1,2,4,3,0,2,0, %U A363437 2,3,7,5,3,8,0,3,8,5,1,9,6,1,7,2,1,9,1,4,6,2,7,4,2,8,8,8,4,6,6,8,6,6,8,5,2 %N A363437 Decimal expansion of the volume of the regular tetrahedron inscribed in the unit-radius sphere. %H A363437 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/RegularTetrahedron.html">Regular Tetrahedron</a>. %H A363437 Wikipedia, <a href="https://en.wikipedia.org/wiki/Tetrahedron#Regular_tetrahedron">Tetrahedron: Regular tetrahedron</a>. %H A363437 <a href="/index/Al#algebraic_02">Index entries for algebraic numbers, degree 2</a>. %F A363437 Equals 8/(9*sqrt(3)). %F A363437 Equals A118273 / 3. %F A363437 Equals A020829 / A187110 ^ 3. %e A363437 0.51320023927966734623035447155729551613120155668455... %t A363437 RealDigits[8/(9*Sqrt[3]), 10, 120][[1]] %o A363437 (PARI) 8/9/sqrt(3) \\ _Charles R Greathouse IV_, Feb 07 2025 %Y A363437 Cf. A118273 (cube), A122553 (regular octahedron), A339259 (regular icosahedron), A363438 (regular dodecahedron). %Y A363437 Other constants related to the regular tetrahedron: A020781, A020829, A137914, A156546, A187110, A210974, A232812, A236555. %K A363437 nonn,cons %O A363437 0,1 %A A363437 _Amiram Eldar_, Jun 02 2023