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A006779 Number of n-step spirals on cubic lattice.
(Formerly M4121)

%I M4121

%S 1,6,18,54,150,426,1158,3204,8682,23724,64194,174378,470856,1274430,

%T 3434826,9272346,24953004,67230288,180705126,486152604,1305430884,

%U 3507947838,9412114986,25268587338,67752451146,181754458194,487060621596,1305761069730,3497441209182

%N Number of n-step spirals on cubic lattice.

%D N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

%H A. J. Guttmann and K. J. Wallace, <a href="https://doi.org/10.1088/0305-4470/18/16/010">On three-dimensional spiral anisotropic self-avoiding walks</a>, J. Phys. A 18 (1985), L1049-L1054.

%H Sean A. Irvine, <a href="https://github.com/archmageirvine/joeis/blob/master/src/irvine/oeis/a006/A006779.java">Java program</a> (github)

%H G. Szekeres and A. J. Guttmann, <a href="https://doi.org/10.1088/0305-4470/20/2/033">Spiral self-avoiding walks on the triangular lattice</a>, J. Phys. A 20 (1987), 481-493.

%K nonn,walk

%O 0,2

%A _N. J. A. Sloane_

%E More terms from _Sean A. Irvine_, Aug 25 2019

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Last modified September 22 00:42 EDT 2020. Contains 337276 sequences. (Running on oeis4.)