A121975 - OEIS

%I #4 Mar 30 2012 17:25:50

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

%N Number of isomeric aza-benzenoids with seven nitrogen atoms.

%D 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.

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

%K nonn

%O 2,1

%A _Parthasarathy Nambi_, Sep 05 2006