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Search: id:A107966
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| A107966 |
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(1/8640)(n+1)(n+2)^3*(n+3)^2*(n+4)(5n^2+23n+30). |
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+0
1
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| 1, 29, 320, 2100, 9898, 37044, 116928, 323730, 807675, 1851421, 3955952, 7966322, 15249780, 27941200, 49273344, 84012300, 139021461, 223980645, 352290400, 542195192, 818163038, 1212563220, 1767688000, 2538168750, 3593841615
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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->(1/8640)*(n+1)*(n+2)^3*(n+3)^2*(n+4)*(5*n^2+23*n+30): seq(a(n), n=0..26);
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CROSSREFS
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Sequence in context: A126550 A142380 A042632 this_sequence A057131 A125417 A022689
Adjacent sequences: A107963 A107964 A107965 this_sequence A107967 A107968 A107969
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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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