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

Terms

a(0) =1a(1) =1a(2) =1a(3) =5a(4) =9a(5) =13a(6) =33a(7) =69a(8) =121a(9) =253a(10) =529a(11) =1013a(12) =2025a(13) =4141a(14) =8193a(15) =16293a(16) =32857a(17) =65629a(18) =130801a(19) =262229a(20) =524745a(21) =1047949a(22) =2096865a(23) =4195845a(24) =8387641a(25) =16775101a(26) =33558481a(27) =67109045a(28) =134209449a(29) =268443373