4041401

Appears in sequences

• Floor-Sqrt transform of the numbers binomial(3*n,n)/(2*n+1) (A001764).at n=19A192665
• a(n) is the number of primitive solutions to the inverse Pythagorean equation 1/x^2 + 1/y^2 = 1/z^2 such that x <= y and x + y + z <= 10^n.at n=14A341990