Expansion of (1-x)^4/((1-x)^6 - x^6).

Terms

a(0) =1a(1) =2a(2) =3a(3) =4a(4) =5a(5) =6a(6) =8a(7) =16a(8) =45a(9) =130a(10) =341a(11) =804a(12) =1730a(13) =3460a(14) =6555a(15) =12016a(16) =21845a(17) =40410a(18) =77540a(19) =155080a(20) =320001a(21) =669526a(22) =1398101a(23) =2884776a(24) =5858126a(25) =11716252a(26) =23166783a(27) =45536404a(28) =89478485a(29) =176565486