A121974 Number of isomeric aza-benzenoids with eight nitrogen atoms.

1, 42, 1410, 32326, 561378, 8069192, 101090191, 1141425811, 11879179287

Offset: 2

Author

Parthasarathy Nambi, Sep 05 2006

Keywords

• nonn

Examples

			If n=5 then the number of isomeric aza-benzenoids with eight nitrogen atoms is 32326. 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.