A121951 Number of isomeric aza-benzenoids with three nitrogen atoms and n hexagons.

3, 14, 109, 730, 4918, 32043, 204417, 1277866, 7860506, 47678819

Offset: 1

Author

Parthasarathy Nambi, Sep 04 2006

Keywords

• nonn

Examples

			If n=5 then the number of isomeric aza-benzenoids with three nitrogen atoms is 4918. 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.