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 A019807 #13 Sep 08 2022 08:44:44 %S A019807 1,2,2,7,1,8,1,0,4,2,9,4,5,8,5,4,8,4,3,8,7,5,5,4,5,2,9,5,8,7,8,1,0,5, %T A019807 7,2,4,4,1,0,6,5,0,6,8,3,7,8,2,9,4,1,2,7,5,2,6,7,4,1,9,1,8,3,0,4,0,0, %U A019807 0,5,2,8,9,1,6,4,5,5,6,4,9,9,7,3,8,2,2,6,3,1,1,4,7,1,3,0,4,0,8 %N A019807 Decimal expansion of sqrt(2*e)/19. %H A019807 Ivan Panchenko, <a href="/A019807/b019807.txt">Table of n, a(n) for n = 0..1000</a> %e A019807 0.12271810429458548438755452958781057244106506837829412752... %t A019807 RealDigits[Sqrt[2*E]/19, 10, 100][[1]] (* _G. C. Greubel_, Sep 08 2018 *) %o A019807 (PARI) default(realprecision, 100); sqrt(2*exp(1))/19 \\ _G. C. Greubel_, Sep 08 2018 %o A019807 (Magma) SetDefaultRealField(RealField(100)); R:= RealField(); Sqrt(2*Exp(1))/19; // _G. C. Greubel_, Sep 08 2018 %Y A019807 Cf. A019798 (sqrt(2*e)). %K A019807 nonn,cons %O A019807 0,2 %A A019807 _N. J. A. Sloane_