253709

Appears in sequences

• G.f. A(x) satisfies: 1/A(x)^2 + 4*x*A(x)^2 = 1/A(x^2) + 2*x*A(x^2).at n=7A187814
• G.f. satisfies A(x/(1-x)) = x*(1-sqrt(1-4*A(x)))/(2*A(x)).at n=14A201778