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 A181909 #16 Apr 02 2012 23:05:50 %S A181909 3,6,8,1,7,1,6,0,1,9,3,7,2,3,8,7,3,8,1,2,4,1,1,3,8,1,8,4,6,9,0,0,9,2, %T A181909 4,3,4,5,6,8,6,9,3,8,0,3,7,6,5,0,7,6,5,5,1,9,1,4,7,8,4,5,4,2,7,8,3,0, %U A181909 5,3,1,0,8,7,6,5,7,3,9,1,9,6,1,8,6,3,3,0,4,2,4,2,2,9,9,6,3,7,6,4 %N A181909 The r value at the onset of the first period-11 cycle of the logistic map f(x) = r*x*(1 - x). %C A181909 Root of a degree 1013*2 = 2026 polynomial. %H A181909 Cheng Zhang, <a href="/A181909/a181909.txt">the polynomial for T = r*(r-2)</a> %e A181909 3.6817160193... %Y A181909 Cf. A086178, A086179, A086180, A086181, A091517, A118452, A118453, A118746, A181906, A181907, A181910, A181911, A181912, A181913, A181915, A181916, A181917, A181918, A181919. %K A181909 nonn,cons %O A181909 1,1 %A A181909 _Cheng Zhang_, Apr 01 2012