A121975 Number of isomeric aza-benzenoids with seven nitrogen atoms.

2, 100, 2276, 38500, 525764, 6229444, 66405417, 652844870, 6018548260

Offset: 2

Author

Parthasarathy Nambi, Sep 05 2006

Keywords

• nonn

Examples

			If n=5 then the number of isomeric aza-benzenoids with seven nitrogen atoms is 38500. 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.