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

Terms

a(0) =1a(1) =2a(2) =2a(3) =2a(4) =3a(5) =4a(6) =5a(7) =6a(8) =8a(9) =10a(10) =13a(11) =16a(12) =21a(13) =26a(14) =34a(15) =42a(16) =55a(17) =68a(18) =89a(19) =110a(20) =144a(21) =178a(22) =233a(23) =288a(24) =377a(25) =466a(26) =610a(27) =754a(28) =987a(29) =1220