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

Terms

a(0) =1a(1) =0a(2) =2a(3) =4a(4) =6a(5) =14a(6) =22a(7) =46a(8) =74a(9) =138a(10) =236a(11) =406a(12) =698a(13) =1182a(14) =1994a(15) =3342a(16) =5590a(17) =9274a(18) =15386a(19) =25380a(20) =41818a(21) =68670a(22) =112586a(23) =184210a(24) =300940a(25) =490962a(26) =800026a(27) =1302278a(28) =2118008a(29) =3442042