Expansion of (Sum_{k>=0} x^(k^2*(k+1)^2/4))^12.

Terms

a(0) =1a(1) =12a(2) =66a(3) =220a(4) =495a(5) =792a(6) =924a(7) =792a(8) =495a(9) =232a(10) =198a(11) =672a(12) =1981a(13) =3960a(14) =5544a(15) =5544a(16) =3960a(17) =1980a(18) =726a(19) =792a(20) =2982a(21) =7920a(22) =13860a(23) =16632a(24) =13860a(25) =7920a(26) =2970a(27) =880a(28) =2046a(29) =7920