154588

Appears in sequences

• G.f. C(x) satisfies: C(x) = (1 - x*C(x))*(1 - 2*x*C(x)) / (1 - 3*x*C(x))^2.at n=6A341963
• G.f. satisfies A(x) = (1 + x)^2 + x*A(x)^2.at n=9A366694