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A107310 Triangle read by rows, related to enumeration of polycyclic conjugated hydrocarbons (see Brunvoll reference for precise definition). 0

%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), 1-13.

%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

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Last modified August 13 10:40 EDT 2022. Contains 356080 sequences. (Running on oeis4.)