0,2

S. J. Cyvin and I. Gutman, Kekule structures in benzenoid hydrocarbons, Lecture Notes in Chemistry, No. 46, Springer, New York, 1988 (see p. 210).

Sequence in context: A052518 A135032 A122074 this_sequence A081016 A083426 A122471

Adjacent sequences: A123354 A123355 A123356 this_sequence A123358 A123359 A123360

nonn

N. J. A. Sloane (njas(AT)research.att.com), Oct 10 2006