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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. 2
1, 472, 467133, 636541920, 1038934571875, 1903991899195896, 3782689379194538057, 7975744222034262960000, 17602442780233361771120400, 40278979798251016073962405000 (list; graph; refs; listen; history; internal format)
OFFSET

1,2

LINKS

Index entries for sequences related to Lyndon words

FORMULA

1/(120n) * sum over d|n of {mu(n/d) * (5d)! / d!^5}.

CROSSREFS

Inverse Witt transform of A006180.

Sequence in context: A187161 A180838 A006180 * A157434 A084629 A075286

Adjacent sequences:  A074651 A074652 A074653 * A074655 A074656 A074657

KEYWORD

nonn

AUTHOR

Christian G. Bower (bowerc(AT)usa.net), Aug 29 2002

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Last modified February 16 11:30 EST 2012. Contains 205907 sequences.