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

Terms

a(0) =1a(1) =2a(2) =6a(3) =7a(4) =21a(5) =22a(6) =66a(7) =67a(8) =201a(9) =202a(10) =606a(11) =607a(12) =1821a(13) =1822a(14) =5466a(15) =5467a(16) =16401a(17) =16402a(18) =49206a(19) =49207a(20) =147621a(21) =147622a(22) =442866a(23) =442867a(24) =1328601a(25) =1328602a(26) =3985806a(27) =3985807a(28) =11957421a(29) =11957422