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A005958 Number of esters with n carbon atoms.
(Formerly M1210)
0
1, 2, 4, 10, 25, 64, 172, 472, 1319, 3750, 10796, 31416, 92276, 273172, 814246, 2441688, 7360877, 22295746, 67819576, 207083944, 634512581, 1950301202, 6011920720, 18581123978, 57568802820, 178763375468, 556255762692, 1734248037856 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,2

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=2..29.

R. C. Read, The Enumeration of Acyclic Chemical Compounds, pp. 25-61 of A. T. Balaban, ed., Chemical Applications of Graph Theory, Ac. Press, 1976. [Annotated scanned copy] See p. 44.

FORMULA

G.f. B(x)*(B(x)-1) where B(x) is the g.f. for A000625. - Sean A. Irvine, Nov 12 2016

CROSSREFS

Sequence in context: A151536 A026269 A000645 * A166516 A230552 A230555

Adjacent sequences:  A005955 A005956 A005957 * A005959 A005960 A005961

KEYWORD

nonn

AUTHOR

N. J. A. Sloane.

EXTENSIONS

More terms from Sean A. Irvine, Nov 12 2016

STATUS

approved

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Last modified January 19 20:33 EST 2019. Contains 319310 sequences. (Running on oeis4.)