Expansion of 1/(1 + Sum_{i>=1} q^(i^2)/Product_{j=1..i} (1 + q^j)^2).

Terms

a(0) =1a(1) =-1a(2) =3a(3) =-8a(4) =20a(5) =-51a(6) =132a(7) =-339a(8) =868a(9) =-2228a(10) =5720a(11) =-14676a(12) =37659a(13) =-96644a(14) =248004a(15) =-636413a(16) =1633144a(17) =-4190920a(18) =10754580a(19) =-27598012a(20) =70821032a(21) =-181738372a(22) =466370429a(23) =-1196782952a(24) =3071141180a(25) =-7881051500a(26) =20224069573a(27) =-51898276576a(28) =133179482008a(29) =-341760374284