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

Terms

a(0) =1a(1) =10a(2) =56a(3) =240a(4) =880a(5) =2912a(6) =8960a(7) =26112a(8) =72960a(9) =197120a(10) =518144a(11) =1331200a(12) =3354624a(13) =8314880a(14) =20316160a(15) =49020928a(16) =116981760a(17) =276430848a(18) =647495680a(19) =1504706560a(20) =3471835136a(21) =7958691840a(22) =18136170496a(23) =41104179200a(24) =92694118400a(25) =208071032832a(26) =465064427520