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 A019645 #20 Feb 03 2025 09:47:05 %S A019645 2,9,2,2,2,8,2,3,6,5,3,2,2,2,7,7,8,6,4,5,4,1,6,2,3,0,7,6,1,0,7,6,8,2, %T A019645 3,1,5,3,9,7,9,0,7,5,5,2,6,4,6,5,6,6,8,5,9,0,1,7,7,4,0,0,1,1,4,7,1,9, %U A019645 5,6,1,7,2,3,6,2,9,5,6,8,8,4,4,4,3,9,5,6,5,6,7,7,6,7,0,5,8,9,2 %N A019645 Decimal expansion of sqrt(Pi*e). %H A019645 Ivan Panchenko, <a href="/A019645/b019645.txt">Table of n, a(n) for n = 1..1000</a> %F A019645 Equals A002161*A019774. - _R. J. Mathar_, Apr 11 2024 %e A019645 2.9222823653222778645416230761076823153979... %t A019645 RealDigits[Sqrt[Pi E],10,120][[1]] (* _Harvey P. Dale_, Jun 14 2014 *) %o A019645 (PARI) sqrt(Pi*exp(1)) \\ _G. C. Greubel_, Nov 17 2017 %o A019645 (Magma) C<i> := ComplexField(); [Sqrt(Pi(C)*Exp(1))]; // _G. C. Greubel_, Nov 17 2017 %Y A019645 Cf. A019609. %K A019645 nonn,cons %O A019645 1,1 %A A019645 _N. J. A. Sloane_