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 A354619 #12 Jul 10 2022 16:44:47 %S A354619 6,4,3,7,0,9,0,1,4,6,9,5,0,3,7,1,3,3,4,4,2,9,4,4,2,9,4,4,7,1,4,5,6,7, %T A354619 8,1,2,9,9,6,5,7,5,8,2,9,0,1,4,9,8,8,9,9,4,7,4,7,6,7,9,4,5,4,9,1,6,7, %U A354619 6,0,7,6,3,4,1,7,4,2,1,2,6,4,1,3,6,3,6 %N A354619 Decimal expansion of Pi + e + gamma, where gamma is Euler's constant (or the Euler-Mascheroni constant). %C A354619 Although in 1737 Euler proved that e is irrational and in 1761 Lambert proved the same for Pi, it is not presently known whether Pi + e + gamma is rational or irrational. %F A354619 Equals A000796 + A001113 + A001620 = 2*e + A211015. %e A354619 6.43709014695037133442944294471... %t A354619 RealDigits[Pi+E+EulerGamma, 10, 100][[1]] %o A354619 (Magma) SetDefaultRealField(RealField(100)); R:= RealField(); Pi(R) + Exp(1) + EulerGamma(R); %o A354619 (PARI) default(realprecision, 100); Pi + exp(1) + Euler %Y A354619 Cf. A000796, A001113, A001620, A203816, A211015. %K A354619 nonn,cons %O A354619 1,1 %A A354619 _Marco Ripà_, Jul 08 2022