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 A338168 #27 Nov 30 2020 08:43:29
%S A338168 1,0,1,2,4,0,9,8,5,2,7,6,5,9,8,7,3,2,0,4,6,8,1,8,5,7,2,7,0,1,9,3,5,4,
%T A338168 8,7,7,0,7,1,7,2,6,4,3,0,7,0,7,0,7,8,9,1,7,3,0,0,9,1,0,5,6,0,5,0,0,2,
%U A338168 2,6,6,7,8,8,0,2,3,0,6,6,7,1,2,1,2,1,9,1
%N A338168 Decimal expansion of Sum_{n>=1} 1/(2n-1)^(2n).
%C A338168 This is the sum of the inverse of odd numbers raised to the even numbers.
%F A338168 Equals Sum_{n>=1} 1/A222621(n).
%e A338168 1.0124098527659873204681857270193548770717264307070789173009...
%o A338168 (PARI) suminf(n=1, (2*n-1)^(-2*n))
%Y A338168 Cf. A073009, A222621, A338167.
%K A338168 nonn,cons
%O A338168 1,4
%A A338168 _Mario Cortés_, Oct 14 2020