A015684 - OEIS

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A015684

Expansion of e.g.f. theta_3^(-7/2).

1, -7, 63, -693, 8841, -127575, 2047815, -36081045, 690863985, -14263534215, 315469515375, -7434244696725, 185817177956025, -4906778826324375, 136422375634920375, -3981559981797523125, 121659806332798358625

(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. 102.

LINKS

Seiichi Manyama, Table of n, a(n) for n = 0..432

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: A368164 A345078 A233743 * A051579 A185106 A375175

Adjacent sequences: A015681 A015682 A015683 * A015685 A015686 A015687

KEYWORD

sign

AUTHOR

N. J. A. Sloane

STATUS

approved