A008372 Number of orbits on points that are at n steps from 0 in D_7 lattice.

1, 1, 4, 8, 17, 30, 54, 86, 139, 209, 313, 448, 638

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).

Crossrefs

Sequence in context: A026353 A067773 A301145 * A005697 A215108 A307545

Adjacent sequences: A008369 A008370 A008371 * A008373 A008374 A008375

Keyword

nonn

Author

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

Status

approved