OFFSET
1,4
REFERENCES
M. Kosters, A theory of hexaflexagons, Nieuw Archief Wisk., 17 (1999), 349-362.
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
CROSSREFS
KEYWORD
nonn,more,nice
AUTHOR
N. J. A. Sloane, frb6006(AT)cs.rit.edu (Frank R. Bernhart)
EXTENSIONS
More terms from Mike Godfrey (m.godfrey(AT)umist.ac.uk), Apr 02 2002
STATUS
approved