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

Terms

a(0) =1a(1) =1a(2) =5a(3) =9a(4) =21a(5) =41a(6) =85a(7) =169a(8) =341a(9) =681a(10) =1365a(11) =2729a(12) =5461a(13) =10921a(14) =21845a(15) =43689a(16) =87381a(17) =174761a(18) =349525a(19) =699049a(20) =1398101a(21) =2796201a(22) =5592405a(23) =11184809a(24) =22369621a(25) =44739241a(26) =89478485a(27) =178956969a(28) =357913941a(29) =715827881