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 A232808 #27 Aug 21 2023 11:23:32 %S A232808 4,8,3,5,9,7,5,8,6,2,0,4,9,4,0,8,9,2,2,1,5,0,9,0,0,5,3,9,9,1,7,8,5,4, %T A232808 8,1,6,8,3,3,8,4,2,2,1,6,9,7,1,5,8,4,6,6,7,0,7,6,8,7,6,2,2,6,1,3,6,8, %U A232808 5,2,8,9,5,1,7,1,4,3,5,8,2,2,7,3,8,4,6 %N A232808 Decimal expansion of the surface area of a 3D sphere with unit volume. %C A232808 More generally, the ratio (surface)/(volume)^(2/3), characteristic of the shape of a bounded 3D body, which is invariant under linear scaling and known as the surface index. Its common value for all spheres is the smallest possible among all closed 3D bodies (for a cube, for example, it is exactly 6.0). %H A232808 Stanislav Sykora, <a href="/A232808/b232808.txt">Table of n, a(n) for n = 1..2000</a> %H A232808 <a href="/index/Tra#transcendental">Index entries for transcendental numbers</a> %F A232808 (36*Pi)^(1/3) = 6*A019673^(1/3). %e A232808 4.83597586204940892215090053991785481683384221697158466707687622613685... %t A232808 RealDigits[(36 Pi)^(1/3), 10, 90][[1]] (* _Bruno Berselli_, Dec 01 2013 *) %Y A232808 Cf. A000796 (Pi), A019673 (Pi/6); other sphere metrics: A019694, A019699, A087198, A087199. %K A232808 nonn,cons,easy %O A232808 1,1 %A A232808 _Stanislav Sykora_, Nov 30 2013