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Search: id:A047761
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| 0, 1, 1, 3, 5, 12, 23, 55, 114, 273, 588, 1428, 3156, 7752, 17427, 43263, 98516, 246675, 567281, 1430715, 3316521, 8414640, 19633796, 50067108, 117464424, 300830572, 709098696, 1822766520, 4313876888, 11124755664, 26421284043
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OFFSET
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0,4
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REFERENCES
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L. W. Beineke and R. E. Pippert, Enumerating dissectable polyhedra by their automorphism groups, Canad. J. Math., 26 (1974), 50-67.
S. J. Cyvin et al., Enumeration of staggered conformers of alkanes: complete solution ..., J. Molec. Struct., 413 (1997), 237-239.
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FORMULA
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a(2n-1) = C(3n, n)/(2n+1) = A001764(n).
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CROSSREFS
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Sequence in context: A034758 A131322 A036657 this_sequence A026786 A027246 A090345
Adjacent sequences: A047758 A047759 A047760 this_sequence A047762 A047763 A047764
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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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