Expansion of Product_{k>=1} (1 - x^k)^(k-1).

Terms

a(0) =1a(1) =0a(2) =-1a(3) =-2a(4) =-3a(5) =-2a(6) =-1a(7) =4a(8) =8a(9) =14a(10) =17a(11) =18a(12) =9a(13) =-4a(14) =-27a(15) =-58a(16) =-88a(17) =-114a(18) =-122a(19) =-106a(20) =-48a(21) =48a(22) =200a(23) =376a(24) =577a(25) =746a(26) =862a(27) =840a(28) =646a(29) =208