%I M4163
%S 1,6,24,90,324,1166,4138,14730,51992,183898,646980,2279702,8002976,
%T 28127418,98585096,345848306,1210704274,4241348770,14833284544
%N Number of nstep spirals on cubic lattice.
%D A. J. Guttmann and K. J. Wallace, On threedimensional spiral anisotropic selfavoiding walks, J. Phys. A 18 (1985), L1049L1054.
%D N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
%D G. Szekeres and A. J. Guttmann, Spiral selfavoiding walks on the triangular lattice, J. Phys. A 20 (1987), 481493.
%K nonn
%O 0,2
%A _N. J. A. Sloane_.
