%I #16 May 02 2017 22:17:18
%S 2,3,10,4,18,11,18,5,12,12,14,23,8,20,58,6,66,35,20,39,82,28,12,36,30,
%T 51,106,36,44,24,20,7,130,36,138,60,42,15,20,52,162,83,18,60,178,60,
%U 40,95,12,99,84,66,210,28,18,37,226,30,92,119,162,36,50,8,36,131,22,135,20,30,94,60,48,116
%N A bisection of A002326.
%H Alois P. Heinz, <a href="/A274299/b274299.txt">Table of n, a(n) for n = 0..10000</a>
%H Steve Butler, Persi Diaconis and R. L. Graham, <a href="https://arxiv.org/abs/1412.8533">The mathematics of the flip and horseshoe shuffles</a>, arXiv:1412.8533 [math.CO], 2014.
%H Steve Butler, Persi Diaconis and R. L. Graham, <a href="http://www.jstor.org/stable/10.4169/amer.math.monthly.123.6.542">The mathematics of the flip and horseshoe shuffles</a>, The American Mathematical Monthly 123.6 (2016): 542-556.
%t MultiplicativeOrder[2, 4 n + 3] # _Stan Wagon_, Jun 24 2016
%Y Cf. A002326, A007346, A274298.
%K nonn
%O 0,1
%A _N. J. A. Sloane_, Jun 20 2016