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A008368 Number of orbits on points that are at n steps from the origin in the f.c.c. lattice. 1
1, 1, 3, 4, 7, 8, 13, 14, 20, 22, 29, 31, 40 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..12.

J. H. Conway and N. J. A. Sloane, Low-Dimensional Lattices VII: Coordination Sequences, Proc. Royal Soc. London, A453 (1997), 2369-2389 (pdf).

Index entries for sequences related to f.c.c. lattice

FORMULA

G.f. is conjectured to be (1-x^5)/((1-x)*(1-x^2)^2*(1-x^3)) (a conjecture of Simon Plouffe, see A023054).

CROSSREFS

Cf. A023054.

Sequence in context: A284491 A284506 A157419 * A023054 A060023 A120355

Adjacent sequences:  A008365 A008366 A008367 * A008369 A008370 A008371

KEYWORD

nonn,more

AUTHOR

N. J. A. Sloane and J. H. Conway

STATUS

approved

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Last modified April 27 09:22 EDT 2017. Contains 285508 sequences.