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A015677
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Expansion of e.g.f. theta_3^(21/2).
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1
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1, 21, 399, 6783, 102249, 1370565, 16991415, 216411615, 3146775345, 49819225365, 767467173375, 11808542505375, 208290421179225, 4084751136190725, 76593243172220775, 1426967042034909375
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OFFSET
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0,2
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REFERENCES
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J. H. Conway and N. J. A. Sloane, "Sphere Packings, Lattices and Groups", Springer-Verlag, p. 102.
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LINKS
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Seiichi Manyama, Table of n, a(n) for n = 0..445
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MATHEMATICA
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nmax = 25; CoefficientList[Series[EllipticTheta[3, 0, x]^(21/2), {x, 0, nmax}], x] * Range[0, nmax]! (* Vaclav Kotesovec, Oct 23 2018 *)
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CROSSREFS
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Sequence in context: A296723 A145613 A212786 * A285396 A113363 A223459
Adjacent sequences: A015674 A015675 A015676 * A015678 A015679 A015680
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KEYWORD
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nonn
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AUTHOR
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N. J. A. Sloane
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STATUS
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approved
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