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A008660 Theta series of direct sum of 4 copies of D_4 lattice. 1
1, 96, 3552, 62592, 528864, 2191680, 8951424, 23321856, 67105248, 134971872, 319970880, 550300032, 1147717248, 1771816512, 3371135232, 4826361600, 8594190816, 11587029696, 19592103264 (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. 119.

LINKS

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

Index entries for sequences related to D_4 lattice

MATHEMATICA

terms = 19; s = (1/2 (EllipticTheta[3, 0, q]^4 + EllipticTheta[4, 0, q]^4) )^4 + O[q]^(2 terms); CoefficientList[s, q^2] (* Jean-Fran├žois Alcover, Jul 08 2017 *)

CROSSREFS

Sequence in context: A234075 A164762 A282210 * A164751 A272765 A240445

Adjacent sequences:  A008657 A008658 A008659 * A008661 A008662 A008663

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane

STATUS

approved

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Last modified November 21 16:04 EST 2019. Contains 329371 sequences. (Running on oeis4.)