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

Terms

a(0) =1a(1) =2a(2) =7a(3) =17a(4) =37a(5) =77a(6) =157a(7) =317a(8) =637a(9) =1277a(10) =2557a(11) =5117a(12) =10237a(13) =20477a(14) =40957a(15) =81917a(16) =163837a(17) =327677a(18) =655357a(19) =1310717a(20) =2621437a(21) =5242877a(22) =10485757a(23) =20971517a(24) =41943037a(25) =83886077a(26) =167772157a(27) =335544317a(28) =671088637a(29) =1342177277