Theta series of 13-dimensional lattice Kappa_13 with minimal norm 4.

Terms

a(0) =1a(1) =0a(2) =918a(3) =6624a(4) =36450a(5) =120096a(6) =322436a(7) =764640a(8) =1637766a(9) =2912544a(10) =5591592a(11) =9160992a(12) =14668002a(13) =22913280a(14) =35544420a(15) =48529440a(16) =74114514a(17) =100230912a(18) =136486530a(19) =184801824a(20) =252809100a(21) =308852640a(22) =426995388a(23) =528491520a(24) =664053284a(25) =836215488a(26) =1070501400a(27) =1229873472