529600

Appears in sequences

• Row sums of triangle of coefficients (A086610) where T(n,k) is the coefficient of x^n*y^k in f(x,y) that satisfies f(x,y) = (1-x-x^2)/(1-x)^2 + xy*f(x,y)^2.at n=11A086611
• Nonnegative values x of solutions (x, y) to the Diophantine equation x^2+(x+839)^2 = y^2.at n=11A130647