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A055379 16*a(n) gives theta series of the shadow of the 24-dimensional odd Leech lattice. 0
3, 12216, 1049332, 24866496, 289421466, 2150562080, 11720932296, 50917793280, 186017041471, 592764490128, 1691223619836, 4404312868096, 10623285300642, 24004367672640, 51272935258008, 104280162643968, 203151521341206 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

REFERENCES

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

LINKS

Table of n, a(n) for n=1..17.

G. Nebe and N. J. A. Sloane, Home page for odd Leech lattice

E. M. Rains and N. J. A. Sloane, The Shadow Theory of Modular and Unimodular Lattices, J. Number Theory, 73 (1998), 359-389.

FORMULA

[theta2(z)^24+3*theta4(2z)^8*theta2(z)^16+3*theta4(2z)^16*theta2(z)^8/16]/16

CROSSREFS

A027859.

Sequence in context: A171363 A280655 A262651 * A047777 A195834 A124393

Adjacent sequences:  A055376 A055377 A055378 * A055380 A055381 A055382

KEYWORD

nonn

AUTHOR

Kok Seng Chua (chuaks(AT)ihpc.nus.edu.sg), Jun 22 2000

STATUS

approved

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Last modified March 26 10:57 EDT 2019. Contains 321491 sequences. (Running on oeis4.)