

A056949


J(1)*theta3(z) where J(1) is the series given by A056948.


2



1, 2, 0, 2, 24, 52, 0, 32556, 195984, 261626, 0, 3736682, 16779168, 18348900, 0, 103018596, 397998672, 376729140, 0, 1334328534, 4629497040, 3937811168, 0, 10792678852, 34417510848, 26962705262, 0, 62783490188, 187489533504, 138066125924, 0, 287105737648, 814881802320
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OFFSET

0,2


COMMENTS

a(4n) gives the series A056948(n). It seems only a(3) is negative. What are a(4n+1), a(4n+3)?


REFERENCES

Eichler and Zagier, The Theory of Jacobi form, Birkhauser, 1985


LINKS

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


FORMULA

(E_8*E_{4, 1}56*E_{12, 1})*theta_3(z)


CROSSREFS

Cf. A056947, A056948.
Sequence in context: A077183 A101030 A093857 * A281326 A012622 A013370
Adjacent sequences: A056946 A056947 A056948 * A056950 A056951 A056952


KEYWORD

sign


AUTHOR

Kok Seng Chua (chuaks(AT)ihpc.nus.edu.sg), Jul 17 2000


STATUS

approved



