%I M4355 #14 Dec 27 2018 07:57:34
%S 0,0,0,0,0,1,0,1,7,17,30,49,124,321,761,1721,3815
%N Number of certain self-avoiding walks with n steps on square lattice (see reference for precise definition).
%D N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
%H W. A. Beyer and M. B. Wells, <a href="http://dx.doi.org/10.1016/0097-3165(72)90024-6">Lower bound for the connective constant of a self-avoiding walk on a square lattice</a>, J. Combin. Theory, A 13 (1972), 176-182, Table I.
%Y Cf. A002976.
%K nonn,walk
%O 4,9
%A _N. J. A. Sloane_