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 A174849 #34 Jun 25 2023 01:51:49 %S A174849 8,0,7,9,0,0,7,6,4,1,2,0,2,8,4,3,3,1,2,8,3,3,5,2,0,3,9,3,2,8,6,1,1,9, %T A174849 1,4,7,3,1,8,3,5,0,1,0,8,6,2,7,2,1,7,2,0,9,1,5,2,2,6,0,7,2,2,9,1,5,6, %U A174849 7,6,7,0,0,7,4,7,8,3,0,2,0,2,4,6,0,1,8,7,4,0,5,8,4,0,7,1,3,7,6,5 %N A174849 Decimal expansion of the site percolation threshold for the (3, 12^2) Archimedean lattice. %H A174849 Paul N. Suding and Robert M. Ziff, <a href="https://arxiv.org/abs/cond-mat/9811416">Site percolation thresholds for Archimedean lattices</a>, arXiv:cond-mat/9811416 [cond-mat.dis-nn], 1998. %H A174849 Paul N. Suding and Robert M. Ziff, <a href="https://doi.org/10.1103/PhysRevE.60.275">Site percolation thresholds for Archimedean lattices</a>, Phys. Rev. E 60, 275 (1999): 275-283. Bibcode 1999PhRvE..60..275S. %H A174849 Wikipedia, <a href="http://en.wikipedia.org/wiki/Percolation_threshold">Percolation threshold</a>. %F A174849 Equals (1 - 2*sin(Pi/18))^(1/2). %e A174849 0.80790076412028433128335203932861191473183501086272... %t A174849 RealDigits[Sqrt[1 - 2*Sin[Pi/18]], 10, 120][[1]] (* _Amiram Eldar_, Jun 25 2023 *) %K A174849 nonn,cons %O A174849 0,1 %A A174849 _Jonathan Vos Post_, Dec 22 2012