Expansion of (1/theta_4(q)^2 -1)/4 in powers of q.

Terms

a(0) =1a(1) =3a(2) =8a(3) =19a(4) =42a(5) =88a(6) =176a(7) =339a(8) =633a(9) =1150a(10) =2040a(11) =3544a(12) =6042a(13) =10128a(14) =16720a(15) =27219a(16) =43746a(17) =69483a(18) =109160a(19) =169758a(20) =261504a(21) =399272a(22) =604560a(23) =908248a(24) =1354427a(25) =2005710a(26) =2950544a(27) =4313232a(28) =6267642a(29) =9055856