Expansion of (3 + x^2) / (1 - x)^4.

Terms

a(0) =3a(1) =12a(2) =31a(3) =64a(4) =115a(5) =188a(6) =287a(7) =416a(8) =579a(9) =780a(10) =1023a(11) =1312a(12) =1651a(13) =2044a(14) =2495a(15) =3008a(16) =3587a(17) =4236a(18) =4959a(19) =5760a(20) =6643a(21) =7612a(22) =8671a(23) =9824a(24) =11075a(25) =12428a(26) =13887a(27) =15456a(28) =17139a(29) =18940