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Search: id:A005630
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| A005630 |
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Number of chiral trees with n nodes.
(Formerly M3399)
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+0
2
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| 0, 0, 0, 0, 0, 0, 4, 10, 34, 96, 284, 782, 2226, 6208, 17560, 49618, 141500, 405104, 1168316, 3386538, 9875232, 28939944, 85235762, 252159572, 749160544, 2234378156, 6688358338, 20088296030, 60524845158, 182893018756
(list; graph; listen)
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OFFSET
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1,7
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REFERENCES
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N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
R. W. Robinson, F. Harary and A. T. Balaban, Numbers of chiral and achiral alkanes..., Tetrahedron 32 (1976), 355-361.
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LINKS
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Index entries for sequences related to trees
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FORMULA
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a(n)=A000628(n)-A005629(n). - Emeric Deutsch (deutsch(AT)duke.poly.edu), Nov 21 2004
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CROSSREFS
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Sequence in context: A022445 A091003 A140725 this_sequence A100507 A156700 A149173
Adjacent sequences: A005627 A005628 A005629 this_sequence A005631 A005632 A005633
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KEYWORD
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nonn
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com).
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EXTENSIONS
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Corrected and extended by Emeric Deutsch (deutsch(AT)duke.poly.edu), Nov 21 2004
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