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A141630
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Number of constitutional isomers of alkylcyclobutadienes.
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0
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1, 1, 3, 5, 13, 26, 66, 152, 366, 907, 2225, 6864
(list; graph; refs; listen; history; internal format)
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OFFSET
| 4,3
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REFERENCES
| 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
| If n=15 then the number of constitutional isomers of alkylcyclobutadienes is 6864.
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CROSSREFS
| Sequence in context: A026003 A103792 A076156 * A084173 A190570 A000631
Adjacent sequences: A141627 A141628 A141629 * A141631 A141632 A141633
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KEYWORD
| nonn
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AUTHOR
| Parthasarathy Nambi (PachaNambi(AT)yahoo.com), Aug 28 2008
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