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

%I #14 Oct 09 2016 09:34:16

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

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

%H J. H. Conway and N. J. A. Sloane, Low-Dimensional Lattices VII: Coordination Sequences, Proc. Royal Soc. London, A453 (1997), 2369-2389 (<a href="http://neilsloane.com/doc/Me220.pdf">pdf</a>).

%H G. Nebe and N. J. A. Sloane, <a href="http://www.math.rwth-aachen.de/~Gabriele.Nebe/LATTICES/E8.html">Home page for this lattice</a>

%K nonn,hard

%O 0,3

%A _N. J. A. Sloane_ and _J. H. Conway_