2,2

B. N. Cyvin et al., Isomer enumeration of unbranched catacondensed polygonal systems with pentagons and heptagons, Match, No. 34 (Oct 1996), pp. 109-121.

Cf. A038175.

Sequence in context: A032268 A079245 A122677 this_sequence A163047 A090363 A115086

Adjacent sequences: A038174 A038175 A038176 this_sequence A038178 A038179 A038180

nonn

N. J. A. Sloane (njas(AT)research.att.com).