G.f. A(x) satisfies: A(x) = 1 / (1 - x - x * A(-3*x)).

A349033

G.f. A(x) satisfies: A(x) = 1 / (1 - x - x * A(-3*x)).

Terms

    a(0) =1a(1) =2a(2) =-2a(3) =-34a(4) =826a(5) =70634a(6) =-16895162a(7) =-12385295242

External references