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Search: id:A032275
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A032275 Number of bracelets (turn over necklaces) of n beads of 4 colors. +0
6
4, 10, 20, 55, 136, 430, 1300, 4435, 15084, 53764, 192700, 704370, 2589304, 9608050, 35824240, 134301715, 505421344, 1909209550, 7234153420, 27489127708, 104717491064, 399827748310, 1529763696820 (list; graph; listen)
OFFSET

1,1

LINKS

C. G. Bower, Transforms (2)

F. Ruskey, Necklaces, Lyndon words, De Bruijn sequences, etc.

Index entries for sequences related to bracelets

FORMULA

"DIK" (bracelet, indistinct, unlabeled) transform of 4, 0, 0, 0...

CROSSREFS

Sequence in context: A015889 A020149 A056412 this_sequence A015220 A047199 A038065

Adjacent sequences: A032272 A032273 A032274 this_sequence A032276 A032277 A032278

KEYWORD

nonn

AUTHOR

Christian G. Bower (bowerc(AT)usa.net)

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Last modified December 15 00:47 EST 2009. Contains 170825 sequences.


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