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 A022064 Theta series of D*_11 lattice. 1
 1, 0, 0, 0, 22, 0, 0, 0, 220, 0, 0, 2048, 1320, 0, 0, 0, 5302, 0, 0, 22528, 15224, 0, 0, 0, 33528, 0, 0, 112640, 63360, 0, 0, 0, 116380, 0, 0, 360448, 209550, 0, 0, 0, 339064, 0, 0, 901120, 491768, 0, 0, 0, 719400, 0, 0, 1959936, 1095160, 0, 0, 0, 1538416, 0 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,5 REFERENCES J. H. Conway and N. J. A. Sloane, "Sphere Packings, Lattices and Groups", Springer-Verlag, p. 120. LINKS Andy Huchala, Table of n, a(n) for n = 0..2500 G. Nebe and N. J. A. Sloane, Home page for this lattice EXAMPLE G.f. = 1 + 22*q^4 + 220*q^8 + ... PROG (Magma) L := Dual(Lattice("D", 11)); B := Basis(ThetaSeriesModularFormSpace(L), 20); S := [1, 0, 0, 0, 22, 0, 0]; Coefficients(&+[B[i] * S[i] : i in [1..6]]); // Andy Huchala, Jul 13 2021 CROSSREFS Sequence in context: A104786 A104787 A023922 * A225343 A252670 A297813 Adjacent sequences: A022061 A022062 A022063 * A022065 A022066 A022067 KEYWORD nonn AUTHOR N. J. A. Sloane. STATUS approved

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Last modified July 22 08:35 EDT 2024. Contains 374485 sequences. (Running on oeis4.)