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

Terms

a(0) =1a(1) =2a(2) =4a(3) =10a(4) =23a(5) =53a(6) =123a(7) =285a(8) =660a(9) =1529a(10) =3542a(11) =8205a(12) =19007a(13) =44030a(14) =101996a(15) =236275a(16) =547334a(17) =1267906a(18) =2937120a(19) =6803875a(20) =15761261a(21) =36511157a(22) =84578549a(23) =195927260a(24) =453867933a(25) =1051390708a(26) =2435559643a(27) =5642004185a(28) =13069772820a(29) =30276291184