OFFSET
1,2
COMMENTS
Also number of unrooted self-avoiding walks of n steps on hexagonal [ =triangular ] lattice. - Hugo Pfoertner, Jun 23 2018
LINKS
Ed Pegg, Jr., Illustrations of polyforms
Hugo Pfoertner, Illustration of ratio A001334(n)/a(n) using Plot2.
Eric Weisstein's World of Mathematics, Polyedge
CROSSREFS
KEYWORD
nonn,walk,hard,more
AUTHOR
Ed Pegg Jr, May 13 2009
EXTENSIONS
a(9)-a(13) from Joseph Myers, Oct 05 2011
STATUS
approved