-615296

Appears in sequences

• G.f. A(x) satisfies: 2^n + 1 = Sum_{k=0..n} [x^k] A(x)^n for n>=1.at n=12A100238
• Coefficients of polynomials P(n,x):=-2+P(n-1,x)^2, where P(0,x)=x-2.at n=26A158982