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A015667
Expansion of e.g.f. theta_3^(7/2).
2
1, 7, 35, 105, 273, 4095, 38115, 86625, 540225, 22444695, 215417475, 1819488825, 18942548625, 273922023375, 9015078147075, 69890980784625, -152873391045375, 34948775541054375, 718624343013451875, 6694758964203935625
OFFSET
0,2
REFERENCES
J. H. Conway and N. J. A. Sloane, "Sphere Packings, Lattices and Groups", Springer-Verlag, p. 102.
LINKS
MATHEMATICA
nmax = 25; CoefficientList[Series[EllipticTheta[3, 0, x]^(7/2), {x, 0, nmax}], x] * Range[0, nmax]! (* Vaclav Kotesovec, Oct 23 2018 *)
CROSSREFS
Sequence in context: A130884 A037092 A210368 * A206723 A309920 A307041
KEYWORD
sign
STATUS
approved