Expansion of (1-2x)^2/((1-x)^2(1-2x-x^2)^2).

Terms

a(0) =1a(1) =2a(2) =5a(3) =12a(4) =30a(5) =76a(6) =194a(7) =496a(8) =1267a(9) =3230a(10) =8215a(11) =20844a(12) =52768a(13) =133304a(14) =336100a(15) =845888a(16) =2125381a(17) =5332058a(18) =13357833a(19) =33419820a(20) =83510018a(21) =208437060a(22) =519691110a(23) =1294430448a(24) =3221081335a(25) =8008262966a(26) =19893476315a(27) =49378623564a(28) =122473408452