A141630 Number of constitutional isomers of alkylcyclobutadienes.

1, 1, 3, 5, 13, 26, 66, 152, 366, 907, 2225, 6864

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: A103792 A076156 A339984 * A289467 A289533 A288827

Adjacent sequences: A141627 A141628 A141629 * A141631 A141632 A141633

Keyword

nonn

Author

Parthasarathy Nambi, Aug 28 2008

Status

approved