%N Number of fixed triangular strip polyedges with n edges.
%D N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).
%H C. Domb, <a href="http://dx.doi.org/10.1080/00018736000101199">On the theory of cooperative phenomena in crystals</a>, Advances in Phys., 9 (1960), 149-361. See page 354.
%F Apparently, a(n) = A001334(n)/2 for n >= 1. It needs to be clarified whether the objects described by this sequence are equivalent to the self-avoiding walks on the hexagonal lattice together with a restriction on their orientation. - _Hugo Pfoertner_, Jul 24 2021
%Y Cf. A001334, A151540, A151541.
%A _N. J. A. Sloane_, Jun 11 2012
%E Better description and more terms from _Joseph Myers_, Jun 12 2012