|
| |
|
|
A023912
|
|
Theta series of A_21 lattice.
|
|
0
|
|
|
|
1, 462, 43890, 1501500, 23437722, 198944592, 1114627514, 4828206900, 17160463320, 52574485502, 143000133276, 353652649308, 808266398940, 1728870130680, 3496186881264, 6732994928660, 12429951473478
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
|
OFFSET
|
0,2
|
|
|
REFERENCES
|
J. H. Conway and N. J. A. Sloane, "Sphere Packings, Lattices and Groups", Springer-Verlag, p. 110.
|
|
|
LINKS
|
|
|
|
MATHEMATICA
|
terms = 17; f[q_] = LatticeData["A21", "ThetaSeriesFunction"][-I*Log[q]/Pi]; s = f[q] + O[q]^(2 terms); Partition[CoefficientList[s, q] // Round, 2][[All, 1]][[1 ;; terms]] (* Jean-François Alcover, Jul 06 2017 *)
|
|
|
CROSSREFS
|
|
|
|
KEYWORD
|
nonn
|
|
|
AUTHOR
|
|
|
|
EXTENSIONS
|
More terms from Robert.Harley(AT)inria.fr, see A023902.
|
|
|
STATUS
|
approved
|
| |
|
|
