Expansion of q*Product_{k>=1} (1-q^k)^2*(1-q^(11*k))^2.

Terms

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