G.f. A(x) satisfies A(x) = A(x^3)/A(x^2) + A(x)^2.

Terms

a(0) =1a(1) =1a(2) =1a(3) =4a(4) =10a(5) =28a(6) =82a(7) =256a(8) =808a(9) =2617a(10) =8566a(11) =28447a(12) =95416a(13) =323002a(14) =1101724a(15) =3783769a(16) =13071556a(17) =45396925a(18) =158400937a(19) =555035695a(20) =1952238598a(21) =6890367190a(22) =24395779840a(23) =86623201930a(24) =308388736639