Expansion of A(x) = Sum_{n>=0} 2^(n*(n-1)/2) * (1 + 2^(2*n+1))/3 * x^(n*(n+1)/2).

Terms

a(0) =1a(1) =3a(2) =0a(3) =22a(4) =0a(5) =0a(6) =344a(7) =0a(8) =0a(9) =0a(10) =10944a(11) =0a(12) =0a(13) =0a(14) =0a(15) =699392a(16) =0a(17) =0a(18) =0a(19) =0a(20) =0a(21) =89489408a(22) =0a(23) =0a(24) =0a(25) =0a(26) =0a(27) =0a(28) =22907191296a(29) =0