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A000646 Number of alkyls Y^{II} C_n H_{2n+2} with n carbon atoms.
(Formerly M0800 N0303)
0
1, 2, 3, 6, 13, 28, 62, 144, 338, 810, 1970, 4852, 12073, 30334, 76805, 195850, 502461, 1296122, 3359527, 8745744, 22856223, 59944156, 157718380, 416189954, 1101204387, 2920914484, 7765357967, 20688204244, 55225188289, 147688302518 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,2
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
G. Polya, Algebraische Berechnung der Anzahl der Isomeren einiger organischer Verbindungen, Zeit. f. Kristall., 93 (1936), 415-443; line 12 of Table I.
G. Polya, Algebraische Berechnung der Anzahl der Isomeren einiger organischer Verbindungen, Zeit. f. Kristall., 93 (1936), 415-443; Table I, line 12. (Annotated scanned copy)
FORMULA
G.f.: A(x) = A000598(x)^2.
CROSSREFS
Sequence in context: A032160 A089735 A316694 * A316770 A197463 A032048
KEYWORD
nonn,easy
AUTHOR
STATUS
approved

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Last modified April 22 08:40 EDT 2024. Contains 371893 sequences. (Running on oeis4.)