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

A171192

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

Terms

    a(0) =1a(1) =1a(2) =5a(3) =53a(4) =1045a(5) =37941a(6) =2596693a(7) =343615093a(8) =89402126741

External references