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Search: id:A116719
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| A116719 |
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Number of monocyclic skeletons with n carbon atoms and a ring size of 4. |
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+0
2
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| 1, 2, 4, 8, 24, 55, 147, 365, 954, 2431, 6327, 16369, 42743, 111595, 292849, 769805, 2030456, 5366844, 14222475, 37768154, 100510364, 267987501
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OFFSET
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4,2
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REFERENCES
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Camden A. Parks and James B. Hendrickson, Enumeration of monocyclic and bicyclic carbon skeletons, J. Chem. Inf. Comput. Sci., vol. 31, 334-339 (1991).
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EXAMPLE
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If n=5 then the number of monocyclic skeletons with ring size of four is 2.
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CROSSREFS
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Cf. A063832.
Sequence in context: A078751 A078222 A078223 this_sequence A114900 A115115 A026097
Adjacent sequences: A116716 A116717 A116718 this_sequence A116720 A116721 A116722
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KEYWORD
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nonn
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AUTHOR
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Parthasarathy Nambi (PachaNambi(AT)yahoo.com), Aug 13 2006
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EXTENSIONS
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More terms from njas, Aug 27 2006
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