A121972 - OEIS

%I #4 Mar 30 2012 17:25:49

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

%N Number of isomeric aza-benzenoids with five 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 five nitrogen atoms is 24611. Here n is the number of hexagons.

%K nonn

%O 1,2

%A _Parthasarathy Nambi_, Sep 05 2006