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

Author

Marko Riedel, Apr 28 2023

Keywords

• nonn

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.