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Search: id:A054629
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| A054629 |
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Number of n-bead necklaces with 10 colors. |
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+0
3
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| 0, 10, 55, 340, 2530, 20008, 166870, 1428580, 12501280, 111111340, 1000010044, 9090909100, 83333418520, 769230769240, 7142857857190, 66666666680272, 625000006251280, 5882352941176480, 55555555611222370, 526315789473684220
(list; graph; listen)
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OFFSET
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0,2
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LINKS
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Index entries for sequences related to necklaces
Eric Weisstein's World of Mathematics, Link to a section of The World of Mathematics.
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FORMULA
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(1/n)*Sum_{d|n} phi(d)*10^(n/d), n>0.
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MAPLE
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with(combstruct):A:=[N, {N=Cycle(Union(Z$10))}, unlabeled]: seq(count(A, size=n), n=0..19); - Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Dec 05 2007
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CROSSREFS
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Column 10 of A075195.
Sequence in context: A034241 A022575 A024210 this_sequence A030114 A001557 A000814
Adjacent sequences: A054626 A054627 A054628 this_sequence A054630 A054631 A054632
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KEYWORD
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nonn
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AUTHOR
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njas, Apr 16 2000
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EXTENSIONS
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Edited by Christian G. Bower (bowerc(AT)usa.net), Sep 07 2002
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