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A006780 Number of n-step spirals on cubic lattice.
(Formerly M4163)

%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 n-step spirals on cubic lattice.

%D A. J. Guttmann and K. J. Wallace, On three-dimensional spiral anisotropic self-avoiding walks, J. Phys. A 18 (1985), L1049-L1054.

%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 self-avoiding walks on the triangular lattice, J. Phys. A 20 (1987), 481-493.

%K nonn

%O 0,2

%A _N. J. A. Sloane_.

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Last modified February 15 16:53 EST 2019. Contains 320136 sequences. (Running on oeis4.)