Expansion of ( 1 + 9 * Sum_{k>=0} x^(2^k)/(1 - x^(2^k))^2 )^(1/3).

Terms

a(0) =1a(1) =3a(2) =0a(3) =0a(4) =21a(5) =-111a(6) =504a(7) =-2004a(8) =7092a(9) =-21150a(10) =43614a(11) =24288a(12) =-949878a(13) =7022118a(14) =-38308320a(15) =175670820a(16) =-691787607a(17) =2250673143a(18) =-4994247456a(19) =-2841846468a(20) =120496073523a(21) =-931900270923