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 A373534 #19 Jun 18 2024 07:11:55
%S A373534 2,1,3,5,3,4,4,9,3,3,2,4,8,0,0,4,2,2,8,0,4,6,4,7,5,2,7,9,6,8,3,7,0,6,
%T A373534 7,7,8,8,1,0,8,7,9,3,6,6,0,1,6,4,9,4,0,0,4,0,7,7,3,1,4,4,2,9,1,0,8,7,
%U A373534 0,3,3,0,0,1,4,9,6,8,8,3,7,8,0,6,6,5,8,3,6,5,1,2,2,2,2,2,0,5,9,6,5
%N A373534 Decimal expansion of Pi^(1/2)*Gamma(1/20)/(10*Gamma(11/20)).
%C A373534 Constants from generalized Pi integrals: the case of n=20.
%H A373534 Takayuki Tatekawa, <a href="/A373534/b373534.txt">Table of n, a(n) for n = 1..10001</a>
%F A373534 Equals 2*Integral_{x=0..1} dx/sqrt(1-x^20).
%F A373534 Equals (2*sqrt(Pi)*Gamma(21/20))/Gamma(11/20). - _Peter Luschny_, Jun 17 2024
%e A373534 2.135344933248004228046475279683...
%p A373534 (2*sqrt(Pi)*GAMMA(21/20))/GAMMA(11/20): evalf(%, 102); # _Peter Luschny_, Jun 17 2024
%t A373534 RealDigits[2*Sqrt[Pi]/20*Gamma[1/20]/Gamma[11/20], 10, 5001][[1]]
%Y A373534 Cf. A085565, A113477, A262427, A371824, A371881, A371930, A372111, A372327.
%K A373534 nonn,cons
%O A373534 1,1
%A A373534 _Takayuki Tatekawa_, Jun 08 2024