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%I #21 May 01 2023 05:35:59
%S 1,1,7,297,83488,63698215,93945180662,235528677557853,
%T 926363255677856473,5389375509102629522572,44328152493384890722579175,
%U 497321572654372894502827791849,7392063525541285464935001208117037,142098205771751298697282911028204773107
%N Number of bracelets consisting of four instances each of n swappable colors.
%D F. Harary and E. Palmer, Graphical Enumeration, Academic Press, 1973, page 143.
%H Marko Riedel, <a href="/A362658/b362658.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>
%Y Cf. A054499, A362657, A362659.
%K nonn
%O 0,3
%A _Marko Riedel_, Apr 28 2023
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