G.f. A(x) satisfies: A(x) = A(x^2) / (1 - x - x^2 - x^3 - x^4).

Terms

a(0) =1a(1) =1a(2) =3a(3) =5a(4) =13a(5) =22a(6) =48a(7) =88a(8) =184a(9) =342a(10) =684a(11) =1298a(12) =2556a(13) =4880a(14) =9506a(15) =18240a(16) =35366a(17) =67992a(18) =131446a(19) =253044a(20) =488532a(21) =941014a(22) =1815334a(23) =3497924a(24) =6745360a(25) =12999632a(26) =25063130a(27) =48306046a(28) =93123674a(29) =179492482