Expansion of (1-x)/(1 - x - 2*x^3 + x^4).

Terms

a(0) =1a(1) =0a(2) =0a(3) =2a(4) =1a(5) =1a(6) =5a(7) =5a(8) =6a(9) =15a(10) =20a(11) =27a(12) =51a(13) =76a(14) =110a(15) =185a(16) =286a(17) =430a(18) =690a(19) =1077a(20) =1651a(21) =2601a(22) =4065a(23) =6290a(24) =9841a(25) =15370a(26) =23885a(27) =37277a(28) =58176a(29) =90576