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A014747 Theta series of lattice D20+. 0
1, 0, 760, 0, 77560, 524288, 2508000, 10485760, 34729720, 99614720, 259114704, 608174080, 1327461600, 2739404800, 5341699520, 9921626112, 17701924600, 30592204800, 51294999960, 83277905920, 131880275664 (list; graph; refs; listen; history; internal format)
OFFSET

0,3

REFERENCES

J. H. Conway and N. J. A. Sloane, "Sphere Packings, Lattices and Groups", Springer-Verlag, p. 120.

FORMULA

(theta2^20+theta3^20+theta4^20)/2.

CROSSREFS

Sequence in context: A001920 A034414 A157983 * A165629 A151633 A022051

Adjacent sequences:  A014744 A014745 A014746 * A014748 A014749 A014750

KEYWORD

nonn

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com).

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Last modified February 14 06:20 EST 2012. Contains 205570 sequences.