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 A019647 #19 Sep 08 2022 08:44:44 %S A019647 9,7,4,0,9,4,1,2,1,7,7,4,0,9,2,6,2,1,5,1,3,8,7,4,3,5,8,7,0,2,5,6,0,7, %T A019647 7,1,7,9,9,3,0,2,5,1,7,5,4,8,8,5,5,6,1,9,6,7,2,5,8,0,0,0,3,8,2,3,9,8, %U A019647 5,3,9,0,7,8,7,6,5,2,2,9,4,8,1,4,6,5,2,1,8,9,2,5,5,6,8,6,3,0,8 %N A019647 Decimal expansion of sqrt(Pi*e)/3. %H A019647 Ivan Panchenko, <a href="/A019647/b019647.txt">Table of n, a(n) for n = 0..1000</a> %e A019647 0.9740941217740926215138743587025607717993... %t A019647 RealDigits[Sqrt[Pi*E]/3, 10, 20][[1]] (* _G. C. Greubel_, Jan 10 2017 *) %o A019647 (PARI) sqrt(Pi*exp(1))/3 \\ _G. C. Greubel_, Jan 10 2017 %o A019647 (Magma) C<i> := ComplexField(); [Sqrt(Pi(C)*Exp(1))/3]; // _G. C. Greubel_, Nov 17 2017 %Y A019647 Cf. A019645. %K A019647 nonn,cons %O A019647 0,1 %A A019647 _N. J. A. Sloane_