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 A055747 Expansion of Jacobi form of weight 12 and index 1 for the Niemeier lattice of type E_8^3 or D_16+E_8. 20
 1, 0, 0, 56, 606, 0, 0, 27456, 123156, 0, 0, 3745512, 9217112, 0, 0, 95209152, 188066718, 0, 0, 1144371624, 1960489800, 0, 0, 8505838656, 13289979912, 0, 0, 45755357024, 67080028224, 0, 0, 195411318912, 272570040468, 0, 0 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,4 COMMENTS a(4*n-r^2) gives number of vectors x in the lattice of norm 2n and =r for any fixed vector in the lattice of norm 2. REFERENCES M. Eichler and D. Zagier, The Theory of Jacobi Forms, Birkhauser, 1985. LINKS Table of n, a(n) for n=0..34. FORMULA E_8*E_4, 1. G.f.: b(z) * c(z) where b(z) is g.f. for A003783 and c(z) = 1 + 240*z^4 + 2160*z^8 + ... is A004009 expanded in powers of z^4. - Sean A. Irvine, Apr 05 2022 CROSSREFS Cf. A008411, A003783, A004009. Sequence in context: A005931 A027793 A244945 * A234106 A219475 A264212 Adjacent sequences: A055744 A055745 A055746 * A055748 A055749 A055750 KEYWORD nonn AUTHOR Kok Seng Chua (chuaks(AT)ihpc.nus.edu.sg), Jul 11 2000 STATUS approved

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Last modified December 7 06:17 EST 2023. Contains 367630 sequences. (Running on oeis4.)