Theta series of A_13 lattice.

Terms

a(0) =1a(1) =182a(2) =6006a(3) =62244a(4) =290472a(5) =996996a(6) =2740738a(7) =6362148a(8) =13255242a(9) =25357514a(10) =45323278a(11) =76444368a(12) =123407466a(13) =191916088a(14) =287567280a(15) =421168748a(16) =601759340a(17) =836876040a(18) =1147564418a(19) =1547518336a(20) =2046646602a(21) =2679112800a(22) =3465409948a(23) =4415226816a(24) =5586066486