login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A015669 Expansion of e.g.f. theta_3^(9/2). 1
1, 9, 63, 315, 1161, 8505, 112455, 796635, 2843505, 57661065, 1099313775, 9327901275, 92211082425, 1678394943225, 32985192014775, 598006256722875, 4499525524118625, 75554867738975625, 4316991655250649375 (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..448

MATHEMATICA

nmax = 25; CoefficientList[Series[EllipticTheta[3, 0, x]^(9/2), {x, 0, nmax}], x] * Range[0, nmax]! (* Vaclav Kotesovec, Oct 23 2018 *)

CROSSREFS

Sequence in context: A269641 A269410 A178161 * A202982 A073378 A316461

Adjacent sequences:  A015666 A015667 A015668 * A015670 A015671 A015672

KEYWORD

nonn

AUTHOR

N. J. A. Sloane

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified September 25 22:23 EDT 2020. Contains 337346 sequences. (Running on oeis4.)