G.f. A(x) satisfies: A(x) = 1 + x*A(x^2)/(1 - x)^2.

Terms

a(0) =1a(1) =1a(2) =2a(3) =4a(4) =6a(5) =10a(6) =14a(7) =22a(8) =30a(9) =44a(10) =58a(11) =82a(12) =106a(13) =144a(14) =182a(15) =242a(16) =302a(17) =392a(18) =482a(19) =616a(20) =750a(21) =942a(22) =1134a(23) =1408a(24) =1682a(25) =2062a(26) =2442a(27) =2966a(28) =3490a(29) =4196