192025

Appears in sequences

• G.f. A(x) satisfies: A(x) = 1 + x * A(x/(1 - 3*x)) / (1 - 3*x)^2.at n=7A351757
• E.g.f. satisfies A(x) = exp( x/(1 - x/A(x)) ).at n=8A361090