A074654 Number of Lyndon words (aperiodic necklaces) with 5n beads of 5 colors, n beads of each color. One color labeled, the other 4 unlabeled.
1, 472, 467133, 636541920, 1038934571875, 1903991899195896, 3782689379194538057, 7975744222034262960000, 17602442780233361771120400, 40278979798251016073962405000
Offset: 1
Keywords
Crossrefs
Inverse Witt transform of A006180.
Formula
1/(120n) * sum over d|n of {mu(n/d) * (5d)! / d!^5}.