A008337 Number of orbits on points that are at n steps from 0 in E_8 lattice.

1, 1, 3, 5, 10, 15, 27, 40, 63, 91, 134, 188, 265

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).

G. Nebe and N. J. A. Sloane, Home page for this lattice

Crossrefs

Sequence in context: A045513 A326472 A326597 * A077285 A072523 A054473

Adjacent sequences: A008334 A008335 A008336 * A008338 A008339 A008340

Keyword

nonn,hard

Author

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

Status

approved