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Search: id:A023924
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| A023924 |
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Theta series of A*_12 lattice. |
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+0
1
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| 1, 0, 0, 0, 0, 0, 26, 0, 0, 0, 0, 156, 0, 156, 0, 572, 0, 0, 1430, 1716, 2574, 3432, 0, 0, 5746, 0, 4290, 0, 13182, 0, 0, 22308, 26052, 29744, 33462, 0, 0, 54912, 0, 36036, 0, 89232, 0, 0, 123708, 143000, 156156, 178464, 0, 0, 234234, 0, 141726, 0, 348374, 0
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OFFSET
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0,7
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REFERENCES
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Kok Seng Chua, Circular Summation of the 13th powers of Ramanujan Theta Functions, Ramanujan J., 5 (2001), 353-354.
J. H. Conway and N. J. A. Sloane, "Sphere Packings, Lattices and Groups", Springer-Verlag, p. 114.
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FORMULA
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y^13/x+13*x*y^11+78*x^3*y^9+260*x^5*y^7+494*x^7*y^5+468*x^9*y^3+169*x^11*y+ 13*x^13/y where x=eta(13z) and y=eta(z)
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CROSSREFS
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Sequence in context: A151649 A122500 A116197 this_sequence A022066 A040681 A040682
Adjacent sequences: A023921 A023922 A023923 this_sequence A023925 A023926 A023927
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KEYWORD
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nonn
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com).
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EXTENSIONS
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More terms from Kok Seng Chua (chuaks(AT)ihpc.nus.edu.sg), Jul 31 2001
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