Theta series of D_14 lattice.

Terms

a(0) =1a(1) =364a(2) =16044a(3) =200928a(4) =1089452a(5) =4196920a(6) =12547808a(7) =31553344a(8) =70439852a(9) =142487436a(10) =268594872a(11) =476105504a(12) =800698080a(13) =1296257144a(14) =2022013760a(15) =3056208064a(16) =4507001772a(17) =6481076056a(18) =9123064524a(19) =12637846368a(20) =17190762680a(21) =22999441920a(22) =30453867808a(23) =39772497856a(24) =51254988512