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A032275
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Number of bracelets (turn over necklaces) of n beads of 4 colors.
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8
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4, 10, 20, 55, 136, 430, 1300, 4435, 15084, 53764, 192700, 704370, 2589304, 9608050, 35824240, 134301715, 505421344, 1909209550, 7234153420, 27489127708, 104717491064, 399827748310, 1529763696820
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OFFSET
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1,1
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LINKS
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Table of n, a(n) for n=1..23.
C. G. Bower, Transforms (2)
F. Ruskey, Necklaces, Lyndon words, De Bruijn sequences, etc.
Index entries for sequences related to bracelets
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FORMULA
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"DIK" (bracelet, indistinct, unlabeled) transform of 4, 0, 0, 0...
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CROSSREFS
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Cf. a(n) = A081720(n,4), n>=4. [From Wolfdieter Lang, Jun 03 2012]
Sequence in context: A019498 A020149 A056412 * A220828 A015220 A047199
Adjacent sequences: A032272 A032273 A032274 * A032276 A032277 A032278
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KEYWORD
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nonn
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AUTHOR
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Christian G. Bower
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STATUS
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approved
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