39404domain: NAppears in sequencesa(n) = A142585(n) + A142586(n).at n=11A142710a(n) = ((sqrt(5) + 3)^n + (-sqrt(5) -1)^n + (-sqrt(5) + 3)^n + (sqrt(5) - 1)^n) / 2^n.at n=11A215500G.f. A(x) satisfies: A(x) = Sum_{n>=0} (3 + x*A(x)^n)^n / 4^(n+1).at n=5A302104Expansion of 1 / ((1-x)^3 - x)^2.at n=7A392578