Theta series of 15-dimensional lattice Kappa_15.

Terms

a(0) =1a(1) =0a(2) =1746a(3) =21456a(4) =147150a(5) =607536a(6) =2036334a(7) =5410800a(8) =13282866a(9) =27563184a(10) =56679732a(11) =102040272a(12) =184563384a(13) =302221728a(14) =504866340a(15) =763016400a(16) =1202127174a(17) =1728479808a(18) =2575653198a(19) =3561176016a(20) =5127122304a(21) =6797385072a(22) =9531403128a(23) =12329627616a(24) =16701654486a(25) =21199654080