Theta series of D*_20 lattice.

Terms

a(0) =1a(1) =40a(2) =760a(3) =9120a(4) =77560a(5) =1546224a(6) =2508000a(7) =31204160a(8) =34729720a(9) =300136200a(10) =259114704a(11) =1823305440a(12) =1327461600a(13) =8216920880a(14) =5341699520a(15) =29758804416a(16) =17701924600a(17) =91800254160a(18) =51294999960a(19) =249835104800a(20) =131880275664a(21) =614963569920a(22) =312126610080