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 A343587 #28 Mar 04 2023 08:59:14 %S A343587 1,9,0,9,0,5,8,1,1,1,4,4,1,9,2,2,0,2,6,8,8,5,8,3,1,4,2,8,5,6,2,8,1,8, %T A343587 8,4,9,0,2,2,2,7,2,6,0,2,6,4,3,8,9,4,1,8,4,6,6,3,2,0,1,8,6,6,4,7,2,3, %U A343587 8,4,6,7,9,2,1,1,9,3,7,8,4,6,1,2,4,9,1 %N A343587 Decimal expansion of prime nested prime(n)-th roots. %H A343587 Paolo Xausa, <a href="/A343587/b343587.txt">Table of n, a(n) for n = 1..10000</a> %H A343587 Wikipedia, <a href="https://en.wikipedia.org/wiki/Nested_radical">Nested radical</a> %F A343587 (2 + (3 + (5 + (7 + (prime(n) + ...)^(1/prime(n)))^(1/7))^(1/5))^(1/3))^(1/2). %e A343587 1.90905811144192202688583142856281884902227260264389418466320186647238... %t A343587 RealDigits[Fold[Surd[#1+#2,#2]&,0,Prime[Range[55,1,-1]]],10,200][[1]] (* _Paolo Xausa_, Mar 04 2023 *) %o A343587 (PARI) localprec(100); N=100; my(p=prime(N), x=0); for (k=1, N, x = (x + p)^(1/p); p = precprime(p-1);); x \\ _Michel Marcus_, Apr 21 2021 %Y A343587 Cf. A000040, A105546, A296547. %K A343587 nonn,cons %O A343587 1,2 %A A343587 _Paolo Xausa_, Apr 21 2021 %E A343587 More terms from _Paolo Xausa_, Mar 04 2023