A006779 - OEIS

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A006779

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

1, 6, 18, 54, 150, 426, 1158, 3204, 8682, 23724, 64194, 174378, 470856, 1274430, 3434826, 9272346, 24953004, 67230288, 180705126, 486152604, 1305430884, 3507947838, 9412114986, 25268587338, 67752451146, 181754458194, 487060621596, 1305761069730, 3497441209182

(list; graph; refs; listen; history; text; internal format)

OFFSET

0,2

REFERENCES

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

LINKS

Table of n, a(n) for n=0..28.

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

Sean A. Irvine, Java program (github)

G. Szekeres and A. J. Guttmann, Spiral self-avoiding walks on the triangular lattice, J. Phys. A 20 (1987), 481-493.

CROSSREFS

Sequence in context: A346071 A076941 A357198 * A003208 A174313 A002933