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A008689 Theta series of Niemeier lattice of type A_24. 1
1, 600, 182160, 16924320, 397150800, 4632279120, 34414027200, 187479888960, 814930462800, 2975483302200, 9486481747680, 27053266687200, 70486014432960, 169930748683920, 384163827465600 (list; graph; refs; listen; history; internal format)
OFFSET

0,2

REFERENCES

J. H. Conway and N. J. A. Sloane, "Sphere Packings, Lattices and Groups", Springer-Verlag, p. 407.

FORMULA

This series is the q-expansion of 67/72 E_4(z)^3 + 5/72 E_6(z)^2. Cf. A004009, A013973. - Daniel D. Briggs, Nov 25 2011

CROSSREFS

a(n)=A023936(25n) - Kok Seng Chua (chuaks(AT)ihpc.nus.edu.sg), Aug 02 2001

Sequence in context: A023915 A035850 A093260 * A126835 A020370 A050202

Adjacent sequences:  A008686 A008687 A008688 * A008690 A008691 A008692

KEYWORD

nonn

AUTHOR

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

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Last modified February 15 18:15 EST 2012. Contains 205835 sequences.