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A015665
Expansion of e.g.f. theta_3^(3/2).
3
1, 3, 3, -3, 81, 315, -765, 4725, 16065, 1091475, 10843875, -65956275, 770425425, 5892561675, -6512831325, 213901813125, 47691165146625, 1318815779155875, -7354191439720125, 223312383805636125, 2055628831852220625
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]^(3/2), {x, 0, nmax}], x] * Range[0, nmax]! (* Vaclav Kotesovec, Oct 23 2018 *)
CROSSREFS
Cf. A015682.
Sequence in context: A174641 A217671 A118539 * A343120 A230667 A131462
KEYWORD
sign
STATUS
approved