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Search: id:A107942
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| A107942 |
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(1/4320)(n+1)(n+2)^3*(n+3)^3*(n+4)(2n+5). |
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+0
2
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| 1, 28, 300, 1925, 8918, 32928, 102816, 282150, 698775, 1591876, 3383380, 6782139, 12931100, 23609600, 41505024, 70570332, 116486397, 187250700, 293916700, 451511137, 680159634, 1006454240, 1465100000, 2100881250, 2970992115
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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.
Dimensions of certain Lie algebra (see Landsberg-Manivel reference for precise definition). - njas, Oct 15 2007
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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).
J. M. Landsberg and L. Manivel, The sextonions and E7 1/2, Adv. Math. 201 (2006), 143-179. [Th. 7.1, case a=0]
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MAPLE
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a:=n->(1/4320)*(n+1)*(n+2)^3*(n+3)^3*(n+4)*(2*n+5): seq(a(n), n=0..30);
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CROSSREFS
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Sequence in context: A107418 A027781 A126662 this_sequence A042520 A022688 A125416
Adjacent sequences: A107939 A107940 A107941 this_sequence A107943 A107944 A107945
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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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