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: A073980 A034860 A003691 this_sequence A067444 A092648 A026121

Adjacent sequences: A038143 A038144 A038145 this_sequence A038147 A038148 A038149

nonn

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