G.f.: A(x) = (A_1)^2 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.

A132333

G.f.: A(x) = (A_1)^2 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) =2a(2) =3a(3) =8a(4) =17a(5) =36a(6) =85a(7) =184a(8) =405a(9) =898a(10) =1962a(11) =4296a(12) =9371a(13) =20376a(14) =44244a(15) =95844a(16) =207217a(17) =447264a(18) =963835a(19) =2073900a(20) =4456374a(21) =9563620a(22) =20499344a(23) =43891176a(24) =93877423a(25) =200594560a(26) =428231448a(27) =913400192a(28) =1946652868a(29) =4145533218

External references