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.
EXAMPLE
If n=15 then the number of constitutional isomers of alkylcyclobutadienes is 6864.
CROSSREFS
KEYWORD
nonn
AUTHOR
Parthasarathy Nambi, Aug 28 2008
STATUS
approved