2,1
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.
Table of n, a(n) for n=2..10.
If n=5 then the number of isomeric aza-benzenoids with seven nitrogen atoms is 38500. Here n is the number of hexagons.
Sequence in context: A230816 A174646 A092699 * A102188 A225601 A332567
Adjacent sequences: A121972 A121973 A121974 * A121976 A121977 A121978
nonn
Parthasarathy Nambi, Sep 05 2006
approved
