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 A100941 #14 Mar 23 2025 18:40:53 %S A100941 2,3,4,1,6,2,7,7,1,8,5,1,1,4,7,8,4,3,1,7,6,6,5,8,6,0,6,2,2,9,6,9,5,5, %T A100941 6,7,8,7,1,2,6,0,8,5,4,7,7,4,4,0,1,9,0,1,3,6,1,5,4,5,7,3,8,1,7,6,8,8, %U A100941 6,3,5,0,9,1,2,8,7,0,7,8,0,4,6,6,8,6,4,0,8,5,5,5,1,8,5,8,8,7,5,5 %N A100941 Decimal expansion of the nested surd sqrt(Pi + sqrt(Pi + sqrt(Pi + ...))). %H A100941 G. C. Greubel, <a href="/A100941/b100941.txt">Table of n, a(n) for n = 1..5000</a> %F A100941 This is the solution of the quadratic equation y^2-y-Pi=0. %e A100941 2.34162771851147843176658606229695567871260854774401... %t A100941 RealDigits[(1+Sqrt[1+4Pi])/2,10,120][[1]] (* _Harvey P. Dale_, Dec 04 2014 *) %o A100941 (PARI) default(realprecision,100); t=0; for(n=1,5000,t=sqrt(t+Pi)); t %Y A100941 Cf. A100942 for continued fraction. %K A100941 cons,nonn %O A100941 1,1 %A A100941 Mark Hudson (mrmarkhudson(AT)hotmail.com), Nov 23 2004