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A151540
Number of 1-sided triangular strip polyedges with n cells.
4
1, 3, 14, 54, 239, 1007, 4375, 18728, 80572, 344651, 1473402, 6280556, 26732173
OFFSET
1,2
LINKS
Eric Weisstein's World of Mathematics, Polyedge
CROSSREFS
KEYWORD
nonn,hard,more
AUTHOR
Ed Pegg Jr, May 13 2009
EXTENSIONS
a(9)-a(13) from Joseph Myers, Oct 05 2011
STATUS
approved