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

Terms

a(0) =1a(1) =3a(2) =6a(3) =12a(4) =25a(5) =51a(6) =102a(7) =204a(8) =409a(9) =819a(10) =1638a(11) =3276a(12) =6553a(13) =13107a(14) =26214a(15) =52428a(16) =104857a(17) =209715a(18) =419430a(19) =838860a(20) =1677721a(21) =3355443a(22) =6710886a(23) =13421772a(24) =26843545a(25) =53687091a(26) =107374182a(27) =214748364a(28) =429496729a(29) =858993459