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A023903
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Theta series of A_12 lattice.
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0
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1, 156, 4290, 36036, 141726, 449592, 1098812, 2417844, 4575714, 8556132, 13981110, 23250084, 34902582, 53549496, 75168522, 109953272, 146737890, 204766848, 265082246, 357073860, 447493332, 591649344, 720098808, 928421208, 1118340652, 1408153188
(list;
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refs;
listen;
history;
text;
internal format)
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OFFSET
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0,2
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REFERENCES
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J. H. Conway and N. J. A. Sloane, "Sphere Packings, Lattices and Groups", Springer-Verlag, p. 110.
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LINKS
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MATHEMATICA
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terms = 21; f[q_] = LatticeData["A12", "ThetaSeriesFunction"][-I*Log[q]/Pi]; s = f[q] + O[q]^(2 terms); Partition[CoefficientList[s, q] // Round, 2][[All, 1]][[1 ;; terms]] (* Jean-François Alcover, Jul 06 2017 *)
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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More terms from Robert.Harley(AT)inria.fr, see A023902.
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STATUS
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approved
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