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A141630 Number of constitutional isomers of alkylcyclobutadienes. 0
1, 1, 3, 5, 13, 26, 66, 152, 366, 907, 2225, 6864 (list; graph; refs; listen; history; text; internal format)
OFFSET

4,3

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.

LINKS

Table of n, a(n) for n=4..15.

EXAMPLE

If n=15 then the number of constitutional isomers of alkylcyclobutadienes is 6864.

CROSSREFS

Sequence in context: A026003 A103792 A076156 * A289467 A289533 A288827

Adjacent sequences:  A141627 A141628 A141629 * A141631 A141632 A141633

KEYWORD

nonn

AUTHOR

Parthasarathy Nambi, Aug 28 2008

STATUS

approved

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Last modified October 14 12:31 EDT 2019. Contains 328006 sequences. (Running on oeis4.)