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 A187110 #33 Jan 26 2025 14:37:56 %S A187110 6,1,2,3,7,2,4,3,5,6,9,5,7,9,4,5,2,4,5,4,9,3,2,1,0,1,8,6,7,6,4,7,2,8, %T A187110 4,7,9,9,1,4,8,6,8,7,0,1,6,4,1,6,7,5,3,2,1,0,8,1,7,3,1,4,1,8,1,2,7,4, %U A187110 0,0,9,4,3,6,4,3,2,8,7,5,6,6,3,4,9,6,4,8,5,8 %N A187110 Decimal expansion of sqrt(3/8). %C A187110 Apart from leading digits, the same as A174925. %C A187110 Radius of the circumscribed sphere (congruent with vertices) for a regular tetrahedron with unit edges. - _Stanislav Sykora_, Nov 20 2013 %D A187110 Jan Gullberg, Mathematics from the Birth of Numbers, W. W. Norton & Co., NY & London, 1997, ยง12.4 Theorems and Formulas (Solid Geometry), p. 450. %H A187110 Michael Penn, <a href="https://www.youtube.com/watch?v=uMtHJ67OUxM">Maximize the area of one ellipse!</a>, YouTube video, 2020. %H A187110 Wikipedia, <a href="http://en.wikipedia.org/wiki/Tetrahedron">Tetrahedron</a>. %H A187110 <a href="/index/Al#algebraic_02">Index entries for algebraic numbers, degree 2</a>. %F A187110 Equals A010464/4. - _Stefano Spezia_, Jan 26 2025 %F A187110 Equals 3*A020781 = A115754/2 = sqrt(A301755). - _Hugo Pfoertner_, Jan 26 2025 %e A187110 sqrt(3/8)=0.61237243569579452454932101867647284799148687016417.. %t A187110 RealDigits[N[Sqrt[3/8],300]][[1]] %o A187110 (PARI) sqrt(3/8) \\ _Charles R Greathouse IV_, Mar 16 2022 %Y A187110 Cf. A002194, A010464, A010466, A020781, A040001, A040005, A115754, A301755. %Y A187110 Cf. Platonic solids circumradii: A010503 (octahedron), A010527 (cube), A019881 (icosahedron), A179296 (dodecahedron). - _Stanislav Sykora_, Feb 10 2014 %K A187110 nonn,cons %O A187110 0,1 %A A187110 _Vladimir Joseph Stephan Orlovsky_, Mar 05 2011