Expansion of Sum_{k>0} (-1)^(k+1) q^(k^2) / ((1-q)(1-q^3)(1-q^5)...(1-q^(2k-1))).

Terms

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