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A022081 Theta series of D*_28 lattice. 1
1, 56, 1512, 26208, 327656, 3147984, 24189984, 421302976, 811401192, 11197272408, 14500933104, 151844650272, 156797510688, 1331217305488, 1163495873088, 8550203006016, 6597606440936, 43532444810736, 30505974273096, 184815887035360, 119983597365744 (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. 120.
LINKS
EXAMPLE
G.f. = 1 + 56*q^2 + 1512*q^4 + ...
PROG
(Sage)
L = [1, 56, 1512, 26208]
M = ModularForms(Gamma0(2), 14)
bases = [_.q_expansion(20) for _ in M.integral_basis()]
f = sum(x*y for (x, y) in zip(bases, L)); list(f) # Andy Huchala, Jul 14 2021
CROSSREFS
Sequence in context: A160290 A030649 A319310 * A017772 A233981 A035723
KEYWORD
nonn
AUTHOR
EXTENSIONS
More terms from Andy Huchala, Jul 14 2021
STATUS
approved

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Last modified March 28 08:22 EDT 2024. Contains 371236 sequences. (Running on oeis4.)