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 A274299 #19 Aug 10 2025 19:25:43
%S A274299 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 A274299 51,106,36,44,24,20,7,130,36,138,60,42,15,20,52,162,83,18,60,178,60,
%U A274299 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 A274299 A bisection of A002326.
%H A274299 Alois P. Heinz, <a href="/A274299/b274299.txt">Table of n, a(n) for n = 0..10000</a>
%H A274299 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 A274299 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 A274299 Table[MultiplicativeOrder[2, 4 n + 3], {n, 0, 73}] (* _Stan Wagon_, Jun 24 2016 *)
%Y A274299 Cf. A002326, A007346, A274298.
%K A274299 nonn
%O A274299 0,1
%A A274299 _N. J. A. Sloane_, Jun 20 2016