The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A015235 Theta series of lattice Kappa_8. 1
 1, 0, 132, 192, 828, 1152, 2796, 2880, 6828, 5376, 14904, 10944, 20772, 18432, 40224, 25920, 53964, 41472, 76452, 58176, 107784, 69504, 156816, 101376, 163284, 131328, 259032, 147072, 295200, 206208, 357480, 250560, 432780, 269568, 576072, 365184, 555804, 426240 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 REFERENCES J. H. Conway and N. J. A. Sloane, "Sphere Packings, Lattices and Groups", Springer-Verlag, p. 161. LINKS Andy Huchala, Table of n, a(n) for n = 0..20000 G. Nebe and N. J. A. Sloane, Home page for this lattice EXAMPLE G.f. = 1 + 132*q^4 + 192*q^6 + ... PROG (Sage) L = [1, 0, 132, 192, 828, 1152, 2796, 2880, 6828, 5376] M = ModularForms(Gamma0(12), 4) bases = [_.q_expansion(35) for _ in M.integral_basis()] f = sum(x*y for (x, y) in zip(bases, L)); list(f) # Andy Huchala, Jul 23 2021 CROSSREFS Cf. A015236 (K_7), A015233 (K_9), A015232 (K_10), A015229 (K_11), A004010 (K_12), A029897 (K_13), A047628 (K_14). Sequence in context: A354812 A030026 A102474 * A204649 A224548 A253510 Adjacent sequences: A015232 A015233 A015234 * A015236 A015237 A015238 KEYWORD nonn AUTHOR N. J. A. Sloane EXTENSIONS More terms from Sean A. Irvine, Feb 26 2020 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified June 24 19:04 EDT 2024. Contains 373690 sequences. (Running on oeis4.)