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 A211966 #23 Aug 02 2014 06:14:08 %S A211966 2,6,20,74,286,1124,4460,17768,70930,283440,1133200,4531686,18124522, %T A211966 72493652,289965744,1159845258,4639345612,18557311624,74229104872, %U A211966 296916136278,1187663978718,4750654782144,19002616863186,76010462922018 %N A211966 Number of binary sequences of length 2n and curling number 1. %C A211966 Equivalently, number of binary sequences of length 2n with no initial repeats (see A122536). %H A211966 B. Chaffin, J. P. Linderman, N. J. A. Sloane and Allan Wilks, <a href="http://arxiv.org/abs/1212.6102">On Curling Numbers of Integer Sequences</a>, arXiv:1212.6102 %H A211966 B. Chaffin, J. P. Linderman, N. J. A. Sloane and Allan Wilks, <a href="https://cs.uwaterloo.ca/journals/JIS/VOL16/Sloane/sloane3.html">On Curling Numbers of Integer Sequences</a>, Journal of Integer Sequences, Vol. 16 (2013), Article 13.4.3. %H A211966 <a href="/index/Cu#curling_numbers">Index entries for sequences related to curling numbers</a> %F A211966 a(n) = 2*A093371(2n) = A093371(2n+1) = A211965(n+1)/2. %Y A211966 Bisection of A122536. %Y A211966 Cf. A093371, A211965, A216955, A216958. %K A211966 nonn %O A211966 1,1 %A A211966 _Omar E. Pol_, Nov 28 2012