52996

Appears in sequences

• Number of ordered factorizations with 2 levels of parentheses indexed by prime signatures.at n=37A050357
• Coefficient of x^(6^n) in Q(x)^(n+1), where Q(x) = Sum_{k>=0} x^(6^k)*(1 - x^(5*6^k))/(1 - x^(6^k)).at n=5A145076
• G.f. A(x) satisfies: A(x) = x + 2*x*A(x) + 3*x^2*A(A(x)) + 4*x^3*A(A(A(x))) +...at n=7A154259