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 A341863 #13 Mar 03 2021 10:34:14
%S A341863 4,4,1,7,6,3,4,7,7,9,0,3,6,2,3,0,4,3,7,4,1,9,0,4,6,0,0,9,0,6,3,5,4,7,
%T A341863 7,6,6,9,9,9,2,7,5,4,3,3,0,4,5,8,7,1,3,3,1,7,6,0,0,6,3,4,0,3,2,3,5,9,
%U A341863 9,2,2,6,9,2,8,5,9,1,9,4,2,8,3,3,3,4,7,7,4,1,1,5,6,9,8,3,7,2,1,8,7,3,1,7,3
%N A341863 Decimal expansion of (4/1)^(9/4)^...^((n+1)^2/n^2)^... .
%e A341863 44176347790.3623043741904600906354776699927543304587133176...
%t A341863 digits = 120; difs = 1; sold = 0; n = 10; While[Abs[difs] > 10^(-digits - 5), s = N[(n + 1)^2/n^2, 1000]; Do[s = ((m + 1)^2/m^2)^s, {m, n - 1, 1, -1}]; difs = s - sold; sold = s; n++]; RealDigits[s, 10, 120][[1]] (* _Vaclav Kotesovec_, Mar 03 2021 *)
%Y A341863 Cf. A341324, A341325, A242759, A242760, A102575.
%K A341863 nonn,cons
%O A341863 11,1
%A A341863 _Koksal Karakus_, Feb 21 2021
%E A341863 More digits from _Alois P. Heinz_, Mar 02 2021