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A000647
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Alkyl naphthalenes C_{n+10} H_{2n+8} with n+10 carbon atoms.
(Formerly M2018 N0798)
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0
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1, 2, 12, 32, 110, 310, 920, 2558, 7177, 19660, 53864, 146180, 396296, 1070296, 2888662, 7785856, 20982905, 56536762, 152378548, 410825678, 1108224556, 2991244712, 8079252116, 21837144430, 59066580606, 159886668880, 433122375508
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OFFSET
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0,2
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REFERENCES
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G. Polya, Algebraische Berechnung der Anzahl der Isomeren einiger organischer Verbindungen, Zeit. f. Kristall., 93 (1936), 415-443; line 14 of Table I.
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).
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LINKS
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Table of n, a(n) for n=0..26.
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FORMULA
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G.f.: A(x) = (A000598(x)^8 + 3*A000598(x^2)^4)/4.
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CROSSREFS
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Sequence in context: A092345 A212761 A102080 * A133577 A106185 A098203
Adjacent sequences: A000644 A000645 A000646 * A000648 A000649 A000650
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KEYWORD
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nonn,easy
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AUTHOR
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N. J. A. Sloane.
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EXTENSIONS
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Additional comments from Bruce Corrigan, Nov 04, 2002
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STATUS
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approved
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