1,7

J. V. Knop et al., On the total number of polyhexes, Match, No. 16 (1984), 119-134.

Cf. A018190, A038143-A038147.

Sequence in context: A020532 A043086 A003364 this_sequence A015576 A070998 A152265

Adjacent sequences: A038142 A038143 A038144 this_sequence A038146 A038147 A038148

nonn

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