A121972 Number of isomeric aza-benzenoids with five nitrogen atoms.

1, 14, 216, 2442, 24611, 223717, 1894520, 15169211, 116213717, 8588186640

Offset: 1

Author

Parthasarathy Nambi, Sep 05 2006

Keywords

• nonn

Examples

			If n=5 then the number of isomeric aza-benzenoids with five nitrogen atoms is 24611. Here n is the number of hexagons.
		

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.