1,1
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=1..10.
If n=5 then the number of isomeric aza-benzenoids with two nitrogen atoms is 1326. Here n is the number of hexagons.
Sequence in context: A181296 A065982 A114693 * A086853 A036918 A200540
Adjacent sequences: A121947 A121948 A121949 * A121951 A121952 A121953
nonn
Parthasarathy Nambi, Sep 04 2006
approved
