login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A023913 Theta series of A_22 lattice. 0
1, 506, 53130, 2029566, 35668446, 340000122, 2094317302, 9773190636, 37179208176, 120683024506, 346388200466, 897628047384, 2144673537006, 4770315795938, 10019792884332, 19955152642348, 38085959774742 (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. 110.
LINKS
MATHEMATICA
terms = 17; f[q_] = LatticeData["A22", "ThetaSeriesFunction"][-I*Log[q]/Pi]; s =
f[q] + O[q]^(2 terms); Partition[CoefficientList[s, q] // Round, 2][[All, 1]][[1 ;; terms]] (* Jean-François Alcover, Jul 06 2017 *)
CROSSREFS
Sequence in context: A295992 A122267 A204946 * A035848 A028685 A152524
KEYWORD
nonn
AUTHOR
EXTENSIONS
More terms from Robert.Harley(AT)inria.fr, see A023902.
STATUS
approved

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified July 14 12:35 EDT 2024. Contains 374318 sequences. (Running on oeis4.)