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!)
A023914 Theta series of A_23 lattice. 0

%I #8 Jul 06 2017 10:56:02

%S 1,552,63756,2704064,53183682,567173376,3844954344,19344711936,

%T 78707396790,270865553048,819741312720,2227781467584,5559628500716,

%U 12871144053504,28053560345184,57835101053184,114001594899018

%N Theta series of A_23 lattice.

%D J. H. Conway and N. J. A. Sloane, "Sphere Packings, Lattices and Groups", Springer-Verlag, p. 110.

%t terms = 17; f[q_] = LatticeData["A23", "ThetaSeriesFunction"][-I*Log[q]/Pi]; s = f[q] + O[q]^(2 terms); Partition[CoefficientList[s, q] // Round, 2][[All, 1]][[1 ;; terms]] (* _Jean-Fran├žois Alcover_, Jul 06 2017 *)

%K nonn

%O 0,2

%A _N. J. A. Sloane_.

%E More terms from Robert.Harley(AT)inria.fr, see A023902.

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 24 13:23 EDT 2024. Contains 374584 sequences. (Running on oeis4.)