Theta series of D_8 lattice.

Terms

a(0) =1a(1) =112a(2) =1136a(3) =3136a(4) =9328a(5) =14112a(6) =31808a(7) =38528a(8) =74864a(9) =84784a(10) =143136a(11) =149184a(12) =261184a(13) =246176a(14) =390784a(15) =395136a(16) =599152a(17) =550368a(18) =859952a(19) =768320a(20) =1175328a(21) =1078784a(22) =1513152a(23) =1362816a(24) =2096192a(25) =1764112a(26) =2496928a(27) =2289280a(28) =3208832a(29) =2731680