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Search: id:A123350
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| A123350 |
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(1/4)(n^4+2n^3+5n^2+4). |
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+0
2
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| 1, 3, 14, 46, 117, 251, 478, 834, 1361, 2107, 3126, 4478, 6229, 8451, 11222, 14626, 18753, 23699, 29566, 36462, 44501, 53803, 64494, 76706, 90577, 106251, 123878, 143614, 165621, 190067, 217126, 246978, 279809, 315811, 355182, 398126, 444853
(list; graph; listen)
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OFFSET
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0,2
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COMMENT
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Kekule numbers for certain benzenoids. - Emeric Deutsch (deutsch(AT)duke.poly.edu), Oct 16 2006
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REFERENCES
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S. J. Cyvin and I. Gutman, Kekule structures in benzenoid hydrocarbons, Lecture Notes in Chemistry, No. 46, Springer, New York, 1988 (see p. 120).
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MAPLE
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a:=n->(n^4+2*n^3+5*n^2+4)/4: seq(a(n), n=0..40); - Emeric Deutsch (deutsch(AT)duke.poly.edu), Oct 16 2006
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CROSSREFS
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Sequence in context: A032225 A032150 A032055 this_sequence A027953 A104196 A006900
Adjacent sequences: A123347 A123348 A123349 this_sequence A123351 A123352 A123353
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KEYWORD
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nonn
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com), Oct 10 2006
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EXTENSIONS
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More terms from Emeric Deutsch (deutsch(AT)duke.poly.edu), Oct 16 2006
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