login
This site is supported by donations to The OEIS Foundation.

 

Logo

Invitation: celebrating 50 years of OEIS, 250000 sequences, and Sloane's 75th, there will be a conference at DIMACS, Rutgers, Oct 9-10 2014.

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A000647 Alkyl naphthalenes C_{n+10} H_{2n+8} with n+10 carbon atoms.
(Formerly M2018 N0798)
0
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 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

REFERENCES

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).

LINKS

Table of n, a(n) for n=0..26.

FORMULA

G.f.: A(x) = (A000598(x)^8 + 3*A000598(x^2)^4)/4.

CROSSREFS

Sequence in context: A092345 A212761 A102080 * A133577 A106185 A098203

Adjacent sequences:  A000644 A000645 A000646 * A000648 A000649 A000650

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane.

EXTENSIONS

Additional comments from Bruce Corrigan, Nov 04, 2002

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Superseeker | Recent | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement .

Last modified September 16 11:21 EDT 2014. Contains 246816 sequences.