2,2

J. Brunvoll, S. J. Cyvin and B. N. Cyvin, Isomer enumeration of polygonal systems..., J. Molec. Struct. (Theochem), 364 (1996), 1-13.

Sequence in context: A104982 A001909 A052852 this_sequence A087761 A120368 A053482

Adjacent sequences: A121121 A121122 A121123 this_sequence A121125 A121126 A121127

nonn

N. J. A. Sloane (njas(AT)research.att.com), Aug 13, 2006