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 A232815 #19 Sep 03 2023 15:24:25 %S A232815 6,0,9,2,9,4,7,7,8,5,3,7,9,5,5,5,6,0,3,4,3,6,3,1,6,0,0,8,9,4,8,7,5,6, %T A232815 9,3,6,9,1,0,7,6,1,5,1,5,0,4,7,2,0,7,1,7,3,2,1,3,0,5,2,1,5,2,9,0,1,1, %U A232815 2,8,0,7,0,2,4,1,1,7,9,6,0,6,9,6,2,2,1,2,0,4,7,0,7,6,5,6,3,9,1,8,0,0,3,2,6 %N A232815 Decimal expansion of the minimum surface index of a closed cone. %C A232815 Equivalently, minimum surface area among all closed cones enclosing a unit volume. It is attained when the cone is right circular and its height equals the diameter of its base multiplied by sqrt(2). Considering one of the ways of marketing ice cream, we might call it the "frozen cone constant". %C A232815 For a general definition of surface index, see A232808. %H A232815 Stanislav Sykora, <a href="/A232815/b232815.txt">Table of n, a(n) for n = 1..1000</a> %H A232815 Wikipedia, <a href="http://en.wikipedia.org/wiki/Cone">Cone</a> %F A232815 Equals (72*Pi)^(1/3) = 6*(Pi/3)^(1/3). %e A232815 6.0929477853795556034363160089487569369107615150472... %t A232815 RealDigits[Surd[72*Pi,3],10,120][[1]] (* _Harvey P. Dale_, Jul 13 2015 *) %Y A232815 Cf. Other surface indices: A232808 (spheres), A232809, A232810, A232811, A232812 (platonic solids), A232813 (closed cylinders), A232814 (open cylinders), A232816 (open cones), A232817 (open tubes). %K A232815 nonn,cons,easy %O A232815 1,1 %A A232815 _Stanislav Sykora_, Dec 04 2013