OFFSET
0,3
REFERENCES
J. H. Conway and N. J. A. Sloane, "Sphere Packings, Lattices and Groups", Springer-Verlag, p. 174.
LINKS
Andy Huchala, Table of n, a(n) for n = 0..20000
PROG
(Magma)
L := Lattice("Lambda", 15);
B := Basis(ThetaSeriesModularFormSpace(L), 20);
Coefficients(B[1]+2340*B[3] +26880*B[4]+198510*B[5]+752640*B[6]+2777320*B[7]+6666240*B[8]+18056580*B[9]+34222080*B[10]+76790952*B[11]+126124800*B[12]+251743800*B[13]+373201920*B[14]+684788880*B[15]+946636800*B[16]); // Andy Huchala, Jun 16 2021
CROSSREFS
KEYWORD
nonn
AUTHOR
STATUS
approved