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!)
A022062 Theta series of D_31 lattice. 2
1, 1860, 503502, 47229864, 2046701220, 47775740520, 671636175480, 6309132101904, 43733123309262, 241275541236780, 1111479953165352, 4426891212365160, 15633379938039144, 49899492947343864, 146147632445771200, 397406328481552528, 1013148957319630500, 2440161908107807952 (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. 118.

LINKS

Seiichi Manyama, Table of n, a(n) for n = 0..10000

MATHEMATICA

terms = 14; f[q_] = LatticeData["D31", "ThetaSeriesFunction"][-I*Log[q]/Pi]; s = f[q] + O[q]^(2 terms); DeleteCases[CoefficientList[s, q], 0][[1 ;; terms]] (* Jean-Fran├žois Alcover, Jul 06 2017 *)

CROSSREFS

Sequence in context: A159212 A120809 A213868 * A107526 A132202 A054815

Adjacent sequences:  A022059 A022060 A022061 * A022063 A022064 A022065

KEYWORD

nonn

AUTHOR

N. J. A. Sloane

EXTENSIONS

More terms from Seiichi Manyama, Oct 16 2018

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 August 8 10:58 EDT 2022. Contains 356009 sequences. (Running on oeis4.)