

A000634


Number of glycols with n carbon atoms.
(Formerly M1604 N0627)


0



1, 2, 6, 14, 38, 97, 260, 688, 1856, 4994, 13550, 36791, 100302, 273824, 749316, 2053247, 5635266, 15484532, 42599485, 117312742, 323373356, 892139389, 2463252315, 6806148956, 18818714543, 52065725034, 144135111504, 399232819042, 1106385615943
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OFFSET

2,2


REFERENCES

N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).
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=2..30.
H. R. Henze and C. M. Blair, The number of structural isomers of the more important types of aliphatic compounds, J. Amer. Chem. Soc., 56 (1) (1934), 157157.
H. R. Henze and C. M. Blair, The number of structural isomers of the more important types of aliphatic compounds, J. Amer. Chem. Soc., 56 (1) (1934), 157157. (Annotated scanned copy)
R. C. Read, The Enumeration of Acyclic Chemical Compounds, pp. 2561 of A. T. Balaban, ed., Chemical Applications of Graph Theory, Ac. Press, 1976. [Annotated scanned copy] See p. 28.


FORMULA

a(n) = A000636(n)  A000642(n).  Sean A. Irvine, Nov 18 2016


CROSSREFS

Cf. A000636, A000642.
Sequence in context: A190788 A168259 A275208 * A006654 A127546 A192484
Adjacent sequences: A000631 A000632 A000633 * A000635 A000636 A000637


KEYWORD

nonn


AUTHOR

N. J. A. Sloane


EXTENSIONS

More terms from Sean A. Irvine, Nov 18 2016


STATUS

approved



