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 A000329 #21 Nov 24 2024 10:15:55 %S A000329 1,2,75,-1,-1,-2,1,2,31,-1,-2,29,1,5,-6,1,1,3,-1,-1,-1,-1,-1,-9,1,1,1, %T A000329 2,-2,-35,0,0,-1,-1,-1,-1,-1,-1,-2,1,1,1,5,-1,-2,4,1,2,-4,0,0,0,-1,-1, %U A000329 -1,-1,-1,-1,-2,1,3,0,0,0,0,0,0,0,0,0,0,0,0,0,-1 %N A000329 Nearest integer to b(n), where b(n) = tan(b(n-1)), b(0) = 1. %C A000329 We have a(11764189) = 329, from b(11764189) ~ 328.86367. This value was found using interval arithmetic with MPFR's tangent function (rounding the results downward and upward at each step), starting at an initial precision of 70000 bits. - _Matthew House_, Nov 17 2024 %H A000329 Matthew House, <a href="/A000329/b000329.txt">Table of n, a(n) for n = 0..10000</a> (terms 0..1016 from Peter J. Taylor) %H A000329 Peter J. Taylor, <a href="/A000329/a000329.cs.txt">C# program to output a b-file</a> %t A000329 Round[NestList[Tan, 1, 100]] (* _Matthew House_, Nov 17 2024 *) %Y A000329 Cf. A000319. %K A000329 sign %O A000329 0,2 %A A000329 _N. J. A. Sloane_ %E A000329 Terms a(71) and beyond from _Peter J. Taylor_, Nov 23 2017