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A047761 a(n) = A047760(2n+1). 2


%S 0,1,1,3,5,12,23,55,114,273,588,1428,3156,7752,17427,43263,98516,

%T 246675,567281,1430715,3316521,8414640,19633796,50067108,117464424,

%U 300830572,709098696,1822766520,4313876888,11124755664,26421284043

%N a(n) = A047760(2n+1).

%H L. W. Beineke and R. E. Pippert, <a href="http://dx.doi.org/10.4153/CJM-1974-006-x">Enumerating dissectable polyhedra by their automorphism groups</a>, Canad. J. Math., 26 (1974), 50-67.

%H S. J. Cyvin, Jianji Wang, J. Brunvoll, Shiming Cao, Ying Li, B. N. Cyvin, and Yugang Wang, <a href="https://doi.org/10.1016/S0022-2860(97)00025-2">Staggered conformers of alkanes: complete solution of the enumeration problem</a>, J. Molec. Struct. 413-414 (1997), 227-239.

%F a(2n-1) = binomial(3n, n)/(2n+1) = A001764(n).

%K nonn

%O 0,4

%A _N. J. A. Sloane_

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Last modified September 30 00:37 EDT 2020. Contains 337432 sequences. (Running on oeis4.)