OFFSET
1,2
REFERENCES
N. Trinajstich, Z. Jericevic, J. V. Knop, W. R. Muller and K. Szymanski, "Computer generation of isomeric structures", Pure and Appl. Chem., vol. 55 (1983) pp. 379-390.
EXAMPLE
If n=5 then the number of isomeric aza-benzenoids with one nitrogen atom is 210. Here n is the number of hexagons.
CROSSREFS
KEYWORD
nonn
AUTHOR
Parthasarathy Nambi, Sep 04 2006
STATUS
approved