Expansion of (1-x)^2/((1-x)^3-5x^3).

Terms

a(0) =1a(1) =1a(2) =1a(3) =6a(4) =21a(5) =51a(6) =126a(7) =351a(8) =981a(9) =2646a(10) =7101a(11) =19251a(12) =52326a(13) =141831a(14) =384021a(15) =1040526a(16) =2820501a(17) =7644051a(18) =20713806a(19) =56132271a(20) =152119701a(21) =412245126a(22) =1117169901a(23) =3027492531a(24) =8204438646a(25) =22233857751a(26) =60253212501a(27) =163284696126