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Search: id:A141630
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| A141630 |
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Number of constitutional isomers of alkylcyclobutadienes. |
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+0
1
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| 1, 1, 3, 5, 13, 26, 66, 152, 366, 907, 2225, 6864
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OFFSET
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4,3
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REFERENCES
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Ching-Wan Lam, "Enumeration of isomers of alkylcyclobutadienes by means of alkyl 1,1,1-triradicals", J. Math. Chem., vol. 31 (2002), pp. 333 - 337. See Table 1 on page 336.
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EXAMPLE
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If n=15 then the number of constitutional isomers of alkylcyclobutadienes is 6864.
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CROSSREFS
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Sequence in context: A026003 A103792 A076156 this_sequence A084173 A000631 A026569
Adjacent sequences: A141627 A141628 A141629 this_sequence A141631 A141632 A141633
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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 28 2008
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