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

Terms

a(0) =1a(1) =-4a(2) =16a(3) =-48a(4) =128a(5) =-312a(6) =704a(7) =-1504a(8) =3072a(9) =-6036a(10) =11488a(11) =-21264a(12) =38400a(13) =-67864a(14) =117632a(15) =-200352a(16) =335872a(17) =-554952a(18) =904784a(19) =-1457136a(20) =2320128a(21) =-3655296a(22) =5702208a(23) =-8813472a(24) =13504512a(25) =-20523996a(26) =30952544a(27) =-46340832a(28) =68901888a(29) =-101777112