login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A008663 Theta series of direct sum of 2 copies of f.c.c. lattice. 1
1, 24, 156, 192, 636, 624, 1312, 1152, 2556, 1752, 4056, 2880, 5152, 4080, 7872, 4992, 10236, 6960, 11388, 8640, 16536, 9216, 19680, 12672, 20512, 15624, 26520, 15744, 30912, 20208, 34112, 23040 (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. 113.

LINKS

Table of n, a(n) for n=0..31.

Index entries for sequences related to f.c.c. lattice

MATHEMATICA

terms = 32; s = 1/4 (EllipticTheta[3, 0, q]^3 + EllipticTheta[4, 0, q]^3)^2 + O[q]^(2 terms); CoefficientList[s, q^2] (* Jean-Fran├žois Alcover, Jul 07 2017, from LatticeData(fcc) *)

CROSSREFS

Sequence in context: A092181 A001702 A004308 * A277984 A125334 A126492

Adjacent sequences:  A008660 A008661 A008662 * A008664 A008665 A008666

KEYWORD

nonn,easy

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 October 21 06:39 EDT 2019. Contains 328292 sequences. (Running on oeis4.)