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A074657
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Number of Lyndon words (aperiodic necklaces) with 5n beads of 5 colors, n beads of each color.
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1
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1, 24, 11328, 11211192, 15277006080, 24934429725000, 45695805580701504, 90784545100668913368, 191417861328822311040000, 422458626725600682506889600, 966695515158024385775097720000, 2277925055026596846727033776223416, 5499697195473757755136472944165075200
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OFFSET
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0,2
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LINKS
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FORMULA
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1/(5n) * sum over d|n of {mu(n/d) * (5d)! / d!^5}.
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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