G.f.: A(x) = A_1 where A_1 = 1/[1 - x*(A_2)^2], A_2 = 1/[1 - x^2*(A_3)^2], A_3 = 1/[1 - x^3*(A_4)^2], ... A_n = 1/[1 - x^n*(A_{n+1})^2] for n>=1.

A132332

G.f.: A(x) = A_1 where A_1 = 1/[1 - x*(A_2)^2], A_2 = 1/[1 - x^2*(A_3)^2], A_3 = 1/[1 - x^3*(A_4)^2], ... A_n = 1/[1 - x^n*(A_{n+1})^2] for n>=1.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =3a(4) =5a(5) =10a(6) =23a(7) =44a(8) =93a(9) =193a(10) =398a(11) =828a(12) =1711a(13) =3548a(14) =7352a(15) =15238a(16) =31569a(17) =65414a(18) =135557a(19) =280856a(20) =581970a(21) =1205860a(22) =2498520a(23) =5177008a(24) =10726715a(25) =22225674a(26) =46051484a(27) =95417966a(28) =197704676a(29) =409640915

External references