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A047761 A047760(2n+1). 2
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 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,4

LINKS

Table of n, a(n) for n=0..30.

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 of the enumeration problem, J. Molec. Struct., 413 (1997), 237-239.

FORMULA

a(2n-1) = C(3n, n)/(2n+1) = A001764(n).

CROSSREFS

Sequence in context: A131322 A224747 A036657 * A026786 A027246 A090345

Adjacent sequences:  A047758 A047759 A047760 * A047762 A047763 A047764

KEYWORD

nonn

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified October 19 15:49 EDT 2018. Contains 316365 sequences. (Running on oeis4.)