307648

Appears in sequences

• Expansion of (1 - 2*x - sqrt(1 - 4*x - 4*x^2))/(4*x^2).at n=10A071356
• G.f. A(x) satisfies: x = Sum_{n>=1} x^n*A(-x)^sigma(n), where sigma(n) = sum of divisors of n (A000203).at n=10A193038