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 A347423 #13 Sep 01 2021 05:13:15 %S A347423 2,3,5,4,8,2,0,0,4,5,0,3,0,9,4,9,3,8,2,0,2,3,1,3,8,6,5,2,9,1,9,3,9,9, %T A347423 2,7,5,4,9,4,7,7,1,3,7,8,7,7,1,6,4,1,0,7,7,0,4,5,0,5,1,5,1,3,0,0,0,0, %U A347423 5,3,1,7,7,0,9,3,9,6,9,8,5,3,6,1,6,8,3,6 %N A347423 Decimal expansion of 2*sqrt(2 log 2). %C A347423 Full width at half maximum of the normal distribution. %H A347423 <a href="/index/Tra#transcendental">Index entries for transcendental numbers</a> %e A347423 2.35482004503094938202313865291939927549477137877164107704505151300005317709.... %t A347423 RealDigits[2*Sqrt[2*Log[2]], 10, 100][[1]] (* _Amiram Eldar_, Sep 01 2021 *) %o A347423 (PARI) log(256)^.5 %Y A347423 Cf. A257872 (squared), A010466*A346713. %K A347423 nonn,cons %O A347423 1,1 %A A347423 _Charles R Greathouse IV_, Aug 31 2021