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Search: id:A107965
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| A107965 |
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(1/86400)(n+1)(n+2)^2*(n+3)^2*(n+4)(11n^4+110n^3+439n^2+820n+600). |
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+0
2
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| 1, 33, 421, 3171, 16954, 71148, 249228, 758934, 2066559, 5135845, 11828817, 25546885, 52216164, 101751664, 190171248, 342572508, 597234429, 1011161361, 1667449861, 2684929863, 4230610846, 6535551660, 9914869900, 14792713650
(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.
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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 (p. 229).
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MAPLE
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a:=n->(1/86400)*(n+1)*(n+2)^2*(n+3)^2*(n+4)*(11*n^4+110*n^3+439*n^2+820*n+600): seq(a(n), n=0..26);
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CROSSREFS
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Sequence in context: A121994 A093743 A085742 this_sequence A058796 A002608 A010949
Adjacent sequences: A107962 A107963 A107964 this_sequence A107966 A107967 A107968
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KEYWORD
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nonn
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AUTHOR
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Emeric Deutsch (deutsch(AT)duke.poly.edu), Jun 12 2005
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