Expansion of (phi(q^4) / phi(q))^2 in powers of q where phi() is a Ramanujan theta function.

Terms

a(0) =1a(1) =-4a(2) =12a(3) =-32a(4) =80a(5) =-184a(6) =400a(7) =-832a(8) =1664a(9) =-3220a(10) =6056a(11) =-11104a(12) =19904a(13) =-34968a(14) =60320a(15) =-102336a(16) =171008a(17) =-281800a(18) =458428a(19) =-736928a(20) =1171552a(21) =-1843328a(22) =2872368a(23) =-4435392a(24) =6790656a(25) =-10313180a(26) =15544136a(27) =-23259968a(28) =34568576a(29) =-51042392