2706524

Appears in sequences

• G.f.: A(x) = 1 + x*A(x)*A(-x) + x^2*exp( Sum_{n>=1} 2*L(n)^2*x^(2*n)/n ), where A(x) = exp(Sum_{n>=1} L(n)*x^n/n).at n=39A205566
• G.f. A(x) satisfies A(x) = 1 + (x * (1+x) * A(x))^4.at n=23A378152