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 A228721 #14 Oct 01 2022 00:12:46 %S A228721 2,1,9,9,1,1,4,8,5,7,5,1,2,8,5,5,2,6,6,9,2,3,8,5,0,3,6,8,2,9,5,6,5,2, %T A228721 0,1,8,9,3,8,0,1,8,5,7,9,5,6,2,5,7,4,0,7,4,6,8,2,4,6,1,2,1,4,6,1,5,4, %U A228721 7,1,4,8,4,4,0,0,3,4,6,2,9,9,0,3,9,6,2,4,3,7,7,7,3,9,4,8,1,9,4,7,5,8,7,5 %N A228721 Decimal expansion of 7*Pi. %C A228721 7*Pi is also the surface area of a sphere whose diameter equals the square root of 7. More generally x*Pi is also the surface area of a sphere whose diameter equals the square root of x. - _Omar E. Pol_, Dec 22 2013 %H A228721 <a href="/index/Tra#transcendental">Index entries for transcendental numbers</a> %e A228721 21.99114857512855266923850368295652018938... %t A228721 RealDigits[7*Pi,10,120][[1]] (* _Harvey P. Dale_, Jan 14 2015 *) %o A228721 (PARI) 7*Pi \\ _Charles R Greathouse IV_, Oct 01 2022 %Y A228721 Cf. A000796, A019692, A122952, A019694, A019669, A228719 (Pi through 6*Pi). %K A228721 nonn,cons %O A228721 2,1 %A A228721 _Omar E. Pol_, Oct 03 2013