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 A181910 #15 Apr 02 2012 23:06:17 %S A181910 3,5,8,2,0,2,3,0,0,1,0,7,3,9,6,2,1,5,1,8,3,0,8,6,5,9,9,9,7,8,9,9,5,6, %T A181910 8,8,7,2,0,3,0,2,7,1,5,0,2,1,8,9,6,4,0,8,1,3,0,8,0,3,5,8,7,2,8,8,3,2, %U A181910 6,8,3,5,4,7,2,0,1,0,1,4,7,3,4,7,2,6,6,9,9,7,0,9,6,6,3,8,9,5,2,6 %N A181910 The value of r at the onset of the first period-12 cycle of the logistic map f(x) = r*x*(1 - x). %C A181910 Root of a degree 1959*2 = 3918 polynomial. %H A181910 Cheng Zhang, <a href="/A181910/a181910.txt">the polynomial for T = r*(r-2)</a> %e A181910 3.58202300107... %Y A181910 Cf. A086178, A086179, A086180, A086181, A091517, A118452, A118453, A118746, A181906, A181907, A181909, A181911, A181912, A181913, A181915, A181916, A181917, A181918, A181919 %K A181910 nonn,cons %O A181910 1,1 %A A181910 _Cheng Zhang_, Apr 01 2012