50360

Appears in sequences

• G.f. satisfies A(x) = 1 + Sum_{n>=0} (x*A(x))^(2^n).at n=12A075864
• Records in A109734.at n=22A109739
• Central coefficients of the Riordan matrix ((1-x-x^2)/(1-2x-x^2),(x-x^2-x^3)/(1-2x-x^2)) (A190215).at n=7A190315