%I A121077
%S A121077 3,34,293,2090
%N A121077 Nonisomorphic catacondensed monoheptahelicenes (see reference for precise 
               definition).
%D A121077 B. N. Cyvin et al., A class of polygonal systems representing polycyclic 
               conjugated hydrocarbons ..., Monat. f. Chemie, 125 (1994), 1327-1337.
%Y A121077 Sequence in context: A086488 A042041 A141789 this_sequence A024396 A066265 
               A134491
%Y A121077 Adjacent sequences: A121074 A121075 A121076 this_sequence A121078 A121079 
               A121080
%K A121077 nonn
%O A121077 5,1
%A A121077 N. J. A. Sloane (njas(AT)research.att.com), Aug 11 2006