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Number of chiral trees with n nodes.
(Formerly M3399)
1

%I M3399 #28 Dec 06 2020 08:31:07

%S 0,0,0,0,0,0,4,10,34,96,284,782,2226,6208,17560,49618,141500,405104,

%T 1168316,3386538,9875232,28939944,85235762,252159572,749160544,

%U 2234378156,6688358338,20088296030,60524845158,182893018756

%N Number of chiral trees with n nodes.

%D N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

%H L. Bytautats and D. J. Klein, <a href="https://doi.org/10.1021/ci990021g">Alkane Isomere Combinatorics: Stereostructure enumeration and graph-invariant and molecylar-property distributions</a>, J. Chem. Inf. Comput. Sci 39 (1999) 803, Table 1.

%H R. W. Robinson, F. Harary and A. T. Balaban, <a href="http://dx.doi.org/10.1016/0040-4020(76)80049-X">The numbers of chiral and achiral alkanes and monosubstituted alkanes</a>, Tetrahedron 32 (1976), 355-361.

%H R. W. Robinson, F. Harary and A. T. Balaban, <a href="/A000625/a000625.pdf">Numbers of chiral and achiral alkanes and monosubstituted alkanes</a>, Tetrahedron 32 (3) (1976), 355-361. (Annotated scanned copy)

%H <a href="/index/Tra#trees">Index entries for sequences related to trees</a>

%F a(n)=A000628(n)-A005629(n). - _Emeric Deutsch_, Nov 21 2004

%K nonn

%O 1,7

%A _N. J. A. Sloane_.

%E Corrected and extended by _Emeric Deutsch_, Nov 21 2004