2080743

Appears in sequences

• Maximal balanced binary trees in the Tamari lattices.at n=39A272371
• G.f. satisfies A(x) = Sum_{n>=1} 2^(n-1) * A(x^(2*n))/A(x^n), with A(0) = 0 and A'(0) = 1.at n=21A378262