%I #26 May 01 2023 05:35:33
%S 1,1,3,25,713,47283,5301453,862284559,190869905951,55139769554236,
%T 20148062989955675,9084944524391553737,4955080153387098326546,
%U 3215465859346835309769199,2448347575754387175150096999,2161727686219210764644850060171
%N Number of bracelets consisting of three instances each of n swappable colors.
%D F. Harary and E. Palmer, Graphical Enumeration, Academic Press, 1973, page 143.
%H Marko Riedel, <a href="/A362657/b362657.txt">Table of n, a(n) for n = 0..45</a>
%H H. Fripertinger, <a href="https://www.researchgate.net/publication/238224437_Enumeration_in_Musical_Theory">Enumeration in Musical Theory</a>, Beiträge zur Elektronischen Musik, 1 (1992).
%H Marko Riedel, math.stackexchange.com, <a href="https://math.stackexchange.com/questions/4687456/">Necklaces and bracelets</a>
%H Marko Riedel, <a href="/A362657/a362657_1.maple.txt">Maple code to compute sequence using cycle indices and Power Group Enumeration</a>
%Y Cf. A054499, A362658, A362659.
%K nonn
%O 0,3
%A _Marko Riedel_, Apr 28 2023