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

Terms

a(0) =0a(1) =1a(2) =2a(3) =5a(4) =13a(5) =30a(6) =63a(7) =127a(8) =254a(9) =509a(10) =1021a(11) =2046a(12) =4095a(13) =8191a(14) =16382a(15) =32765a(16) =65533a(17) =131070a(18) =262143a(19) =524287a(20) =1048574a(21) =2097149a(22) =4194301a(23) =8388606a(24) =16777215a(25) =33554431a(26) =67108862a(27) =134217725a(28) =268435453a(29) =536870910