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A015680 Expansion of theta_3^(-1/2). +0
1
1, -1, 3, -15, 81, -585, 4995, -46935, 499905, -6109425, 79791075, -1138096575, 17774982225, -294439570425, 5240530570275, -100050497922375, 2002010508122625, -42495475420022625, 954152290944727875 (list; graph; listen)
OFFSET

0,3

REFERENCES

J. H. Conway and N. J. A. Sloane, "Sphere Packings, Lattices and Groups", Springer-Verlag, p. 102.

CROSSREFS

Sequence in context: A003448 A084120 A122868 this_sequence A084208 A059271 A014276

Adjacent sequences: A015677 A015678 A015679 this_sequence A015681 A015682 A015683

KEYWORD

sign

AUTHOR

njas

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Last modified July 25 07:41 EDT 2008. Contains 142293 sequences.


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