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 A171759 #21 Feb 07 2025 05:49:29
%S A171759 3,0,2,0,9,4,0,6,1,5,6,5,7,9,8,1,0,2,8,5,9,1,8,9,8,4,0,3,9,1,2,9,8,3,
%T A171759 9,3,3,8,5,6,6,6,3,9,5,1,9,0,5,4,5,7,9,9,0,3,2,7,5,2,2,2,7,2,2,7,7,3,
%U A171759 4,3,6,0,1,9,3,3,9,6,4,5,0,7,8,2,4,5,2,0,2,0,8,8,3,3,8,8,3,2,1,4
%N A171759 Decimal expansion of limit sqrt(2*sqrt(3*sqrt(5*sqrt(7*sqrt(11*...sqrt(prime(n))...))))).
%H A171759 G. C. Greubel, <a href="/A171759/b171759.txt">Table of n, a(n) for n = 1..10000</a>
%F A171759 Equals Product_{n>=1} prime(n)^(1/2^n).
%e A171759 3.0209406156579810285918984039129839338566639519054579903275222722773436019339...
%t A171759 f:= Product[Prime[n]^(1/2^n), {n, 1, 700}]; RealDigits[f, 10, 50][[1]] (* _G. C. Greubel_, Apr 04 2018 *)
%K A171759 nonn,cons
%O A171759 1,1
%A A171759 _Zak Seidov_, Dec 17 2009