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A023937 Theta series of laminated lattice LAMBDA_14. 4
1, 0, 1422, 13056, 84024, 285696, 958422, 2131200, 5413374, 9655296, 20529216, 32221440, 61570992, 87542784, 154925820, 206952192, 345543480, 439022592, 698892510, 853288704, 1321785360, 1557921792, 2326595904, 2692744704, 3941172102, 4428518400, 6356272428 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,3
REFERENCES
J. H. Conway and N. J. A. Sloane, "Sphere Packings, Lattices and Groups", Springer-Verlag, p. 174.
LINKS
PROG
(Sage)
e = DirichletGroup(12).1
M = ModularForms(e, 7, QQ, prec=30)
bases = M.integral_basis()
f = sum(x*y for (x, y) in zip(bases, [1, 0, 1422, 13056, 84024, 285696, 958422, 2131200, 5413374, 9655296, 20529216, 32221440, 61570992, 87542784, 154925820, 206952192]))
f.coefficients(range(30)) # Andy Huchala, Jun 19 2021
CROSSREFS
Sequence in context: A293093 A337671 A237960 * A225567 A216444 A083428
KEYWORD
nonn
AUTHOR
EXTENSIONS
More terms from Andy Huchala, Jun 19 2021
STATUS
approved

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Last modified April 13 12:47 EDT 2024. Contains 371641 sequences. (Running on oeis4.)