%I
%S 1,1,1,1,2,1,5,11,7,1,25,60,46,12,1,125,325,290,106,17,1
%N Triangle read by rows, related to enumeration of polycyclic conjugated hydrocarbons (see Brunvoll reference for precise definition).
%D J. Brunvoll, S. J. Cyvin and B. N. Cyvin, Isomer enumeration of polygonal systems..., J. Molec. Struct. (Theochem), 364 (1996), 113.
%e Triangle begins:
%e 1
%e 1 1
%e 1 2 1
%e 5 11 7 1
%e 25 60 46 12 1
%K nonn,tabl
%O 0,5
%A _N. J. A. Sloane_, Aug 18 2006
