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

Terms

a(0) =1a(1) =-1a(2) =1a(3) =-1a(4) =1a(5) =-1a(6) =0a(7) =1a(8) =-2a(9) =3a(10) =-4a(11) =5a(12) =-5a(13) =4a(14) =-2a(15) =-2a(16) =7a(17) =-13a(18) =19a(19) =-24a(20) =27a(21) =-25a(22) =17a(23) =-2a(24) =-20a(25) =48a(26) =-80a(27) =110a(28) =-132a(29) =137