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 A228824 #20 Oct 01 2022 00:13:12 %S A228824 2,5,1,3,2,7,4,1,2,2,8,7,1,8,3,4,5,9,0,7,7,0,1,1,4,7,0,6,6,2,3,6,0,2, %T A228824 3,0,7,3,5,7,7,3,5,5,1,9,5,0,0,0,8,4,6,5,6,7,7,9,9,5,5,6,7,3,8,4,6,2, %U A228824 5,3,1,2,5,0,2,8,9,6,7,1,9,8,9,0,2,4,2,7,8,6,0,2,7,3,6,9,3,6,5,4,3,8,5,7 %N A228824 Decimal expansion of 4*Pi/5. %C A228824 With offset 2, decimal expansion of 8*Pi. %C A228824 8*Pi is also the surface area of a sphere whose diameter equals the square root of 8, hence its radius equals the square root of 2. More generally x*Pi is also the surface area of a sphere whose diameter equals the square root of x. - _Omar E. Pol_, Dec 18 2013 %H A228824 <a href="/index/Tra#transcendental">Index entries for transcendental numbers</a> %e A228824 4*Pi/5 = 2.5132741228718345907701147066236023073577... %e A228824 8*Pi = 25.132741228718345907701147066236023073577... %t A228824 RealDigits[(4 Pi)/5,10,120][[1]] (* _Harvey P. Dale_, Aug 24 2017 *) %o A228824 (PARI) .8*Pi \\ _Charles R Greathouse IV_, Oct 01 2022 %Y A228824 Cf. A002193, A228819. %Y A228824 Cf. A000796, A019692, A122952, A019694, A019669, A228719, A228721 (Pi through 7*Pi). %K A228824 nonn,cons %O A228824 1,1 %A A228824 _Omar E. Pol_, Oct 03 2013