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 A321463 #12 Oct 02 2022 00:02:10 %S A321463 1,1,3,0,9,7,3,3,5,5,2,9,2,3,2,5,5,6,5,8,4,6,5,5,1,6,1,7,9,8,0,6,2,1, %T A321463 0,3,8,3,1,0,9,8,0,9,8,3,7,7,5,0,3,8,0,9,5,5,5,0,9,8,0,0,5,3,2,3,0,8, %U A321463 1,3,9,0,6,2,6,3,0,3,5,2,3,9,5,0,6,0,9 %N A321463 Decimal expansion of 36*Pi. %C A321463 Surface area and volume of a sphere of radius 3, the unique non-degenerate sphere with volume equal to surface area. %C A321463 Let r be the radius of the sphere. Set (4/3)*Pi*r^3 = 4*Pi*r^2, then (4/3)*Pi*r = 4*Pi and r = 3. Thus, the volume V(3) = (4/3)*Pi*3^3 = 36*Pi and the surface area A(3) = 4*Pi*3^2 = 36*Pi. %C A321463 In other words: 36*Pi is also the surface area of a sphere whose diameter equals the square root of 36. More generally x*Pi is also the surface area of a sphere whose diameter equals the square root of x. - _Omar E. Pol_, Nov 10 2018 %H A321463 <a href="/index/Tra#transcendental">Index entries for transcendental numbers</a> %F A321463 Equals 36*A000796. %e A321463 113.097335529232556584655161798062103831098098377503809555098005323081390626.... %t A321463 First[RealDigits[N[36*Pi, 100], 10]] (* _Stefano Spezia_, Nov 10 2018 *) %o A321463 (PARI) 36*Pi %Y A321463 Cf. A000796. %Y A321463 Cf. A019694 (surface area of sphere of radius 1), A019699 (volume of sphere of radius 1). %K A321463 nonn,cons %O A321463 3,3 %A A321463 _Felix Fröhlich_, Nov 10 2018