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 A019648 #21 Sep 08 2022 08:44:44 %S A019648 7,3,0,5,7,0,5,9,1,3,3,0,5,6,9,4,6,6,1,3,5,4,0,5,7,6,9,0,2,6,9,2,0,5, %T A019648 7,8,8,4,9,4,7,6,8,8,8,1,6,1,6,4,1,7,1,4,7,5,4,4,3,5,0,0,2,8,6,7,9,8, %U A019648 9,0,4,3,0,9,0,7,3,9,2,2,1,1,1,0,9,8,9,1,4,1,9,4,1,7,6,4,7,3,1 %N A019648 Decimal expansion of sqrt(Pi*e)/4. %H A019648 Ivan Panchenko, <a href="/A019648/b019648.txt">Table of n, a(n) for n = 0..1000</a> %e A019648 0.730570591330569466135405769026920578849476888... %t A019648 RealDigits[Sqrt[Pi*E]/4, 10, 20][[1]] (* _G. C. Greubel_, Jan 10 2017 *) %o A019648 (PARI) sqrt(Pi*exp (1))/4 \\ _G. C. Greubel_, Jan 10 2017 %o A019648 (Magma) C<i> := ComplexField(); [Sqrt(Pi(C)*Exp(1))/4]; // _G. C. Greubel_, Nov 17 2017 %Y A019648 Cf. A019645. %K A019648 nonn,cons %O A019648 0,1 %A A019648 _N. J. A. Sloane_