A362657 Number of bracelets consisting of three instances each of n swappable colors.

1, 1, 3, 25, 713, 47283, 5301453, 862284559, 190869905951, 55139769554236, 20148062989955675, 9084944524391553737, 4955080153387098326546, 3215465859346835309769199, 2448347575754387175150096999, 2161727686219210764644850060171

Offset

0,3

References

F. Harary and E. Palmer, Graphical Enumeration, Academic Press, 1973, page 143.

Links

Marko Riedel, Table of n, a(n) for n = 0..45

H. Fripertinger, Enumeration in Musical Theory, Beiträge zur Elektronischen Musik, 1 (1992).

Marko Riedel, math.stackexchange.com, Necklaces and bracelets

Marko Riedel, Maple code to compute sequence using cycle indices and Power Group Enumeration

Crossrefs

Cf. A054499, A362658, A362659.

Sequence in context: A355123 A306795 A131310 * A365359 A062411 A136516

Adjacent sequences: A362654 A362655 A362656 * A362658 A362659 A362660

Keyword

nonn

Author

Marko Riedel, Apr 28 2023

Status

approved