A056946 - OEIS

A056946

Coefficients of J(0)*theta_3(z) where J(0) is sequence A056945.

1, 2, 0, -4, 0, 12, 0, 32728, 196560, 262154, 0, 3734484, 16773120, 18345916, 0, 103029576, 398034000, 376741188, 0, 1334312620, 4629381120, 3937755904, 0, 10792611336, 34417656000, 26962933262, 0, 62783799320, 187489935360, 138065611740, 0, 287105506144, 814879774800

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OFFSET

0,2

COMMENTS

Note a(4n)=A008408(n) gives theta series of Leech lattice. a(4n+2)=0. a(3)<0, apparently the only negative term. What are a(4n+1), a(4n+3)?

REFERENCES

Eichler and Zagier, The Theory of Jacobi Forms, Birkhauser, 1985.

LINKS

Table of n, a(n) for n=0..32.

FORMULA

(E_8*E_{4, 1}-60*E_{12, 1})*theta_3(z)

CROSSREFS