40417domain: NAppears in sequencesSmallest sequence which lists the position of digits "3" in the sequence.at n=42A167453a(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=10A341990