Theta series of D*_21 lattice.

Terms

a(0) =1a(1) =0a(2) =0a(3) =0a(4) =42a(5) =0a(6) =0a(7) =0a(8) =840a(9) =0a(10) =0a(11) =0a(12) =10640a(13) =0a(14) =0a(15) =0a(16) =95802a(17) =0a(18) =0a(19) =0a(20) =652848a(21) =2097152a(22) =0a(23) =0a(24) =3504816a(25) =0a(26) =0a(27) =0a(28) =15266880a(29) =44040192