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

Terms

a(0) =1a(1) =3a(2) =8a(3) =12a(4) =21a(5) =27a(6) =40a(7) =48a(8) =65a(9) =75a(10) =96a(11) =108a(12) =133a(13) =147a(14) =176a(15) =192a(16) =225a(17) =243a(18) =280a(19) =300a(20) =341a(21) =363a(22) =408a(23) =432a(24) =481a(25) =507a(26) =560a(27) =588a(28) =645a(29) =675