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

Terms

a(0) =1a(1) =1a(2) =1a(3) =3a(4) =5a(5) =7a(6) =13a(7) =23a(8) =37a(9) =63a(10) =109a(11) =183a(12) =309a(13) =527a(14) =893a(15) =1511a(16) =2565a(17) =4351a(18) =7373a(19) =12503a(20) =21205a(21) =35951a(22) =60957a(23) =103367a(24) =175269a(25) =297183a(26) =503917a(27) =854455a(28) =1448821a(29) =2456655