1,2
See reference for precise definition.
The old entry with this sequence number was a duplicate of A008284.
J. H. Conway et al., The Symmetries of Things, Peters, 2008, p. 406.
Sequence in context: A079435 A088015 A027377 * A038069 A143391 A019147
Adjacent sequences: A048786 A048787 A048788 * A048790 A048791 A048792
nonn,fini,full
N. J. A. Sloane (njas(AT)research.att.com), Oct 03 2008