Theta series of direct sum of 4 copies of D_4 lattice.

Terms

a(0) =1a(1) =96a(2) =3552a(3) =62592a(4) =528864a(5) =2191680a(6) =8951424a(7) =23321856a(8) =67105248a(9) =134971872a(10) =319970880a(11) =550300032a(12) =1147717248a(13) =1771816512a(14) =3371135232a(15) =4826361600a(16) =8594190816a(17) =11587029696a(18) =19592103264