3539232domain: NAppears in sequencesNumbers m such that there exists at least one integer k < m such that m^2+1 and k^2+1 have the same prime factors.at n=19A282092Pairs of integers (x, y), such that x^2 + 1 and y^2 + 1, 1 < y < x, have the same distinct prime factors.at n=38A284477