Expansion of (1+3*x)/(1-x)^10.

Terms

a(0) =1a(1) =13a(2) =85a(3) =385a(4) =1375a(5) =4147a(6) =11011a(7) =26455a(8) =58630a(9) =121550a(10) =238238a(11) =445094a(12) =797810a(13) =1379210a(14) =2309450a(15) =3759074a(16) =5965487a(17) =9253475a(18) =14060475a(19) =20967375a(20) =30735705a(21) =44352165a(22) =63081525a(23) =88529025a(24) =122713500a(25) =168152556a(26) =227961228a(27) =305965660a(28) =406833460a(29) =536222500