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A005630 Number of chiral trees with n nodes.
(Formerly M3399)
1
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; refs; listen; history; text; internal format)
OFFSET

1,7

REFERENCES

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

LINKS

Table of n, a(n) for n=1..30.

L. Bytautats and D. J. Klein, Alkane Isomere Combinatorics: Stereostructure enumeration and graph-invariant and molecylar-property distributions, J. Chem. Inf. Comput. Sci 39 (1999) 803, Table 1.

R. W. Robinson, F. Harary and A. T. Balaban, The numbers of chiral and achiral alkanes and monosubstituted alkanes, Tetrahedron 32 (1976), 355-361.

R. W. Robinson, F. Harary and A. T. Balaban, Numbers of chiral and achiral alkanes and monosubstituted alkanes, Tetrahedron 32 (3) (1976), 355-361. (Annotated scanned copy)

Index entries for sequences related to trees

FORMULA

a(n)=A000628(n)-A005629(n). - Emeric Deutsch, Nov 21 2004

CROSSREFS

Sequence in context: A022445 A091003 A140725 * A100507 A223006 A156700

Adjacent sequences:  A005627 A005628 A005629 * A005631 A005632 A005633

KEYWORD

nonn

AUTHOR

N. J. A. Sloane.

EXTENSIONS

Corrected and extended by Emeric Deutsch, Nov 21 2004

STATUS

approved

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Last modified November 29 13:17 EST 2021. Contains 349416 sequences. (Running on oeis4.)