Theta series of D8 lattice with respect to midpoint of edge.

Terms

a(0) =2a(1) =24a(2) =124a(3) =368a(4) =746a(5) =1288a(6) =2220a(7) =3536a(8) =4964a(9) =6904a(10) =9536a(11) =12112a(12) =15630a(13) =20592a(14) =24588a(15) =29632a(16) =37472a(17) =43296a(18) =50492a(19) =61456a(20) =68724a(21) =79560a(22) =95404a(23) =104352a(24) =118226a(25) =137392a(26) =148636a(27) =167920a(28) =191904a(29) =204712