12974411domain: NPropertiesPrimalityPrimeyesAppears in sequencesValues of x in x^2 - 49 = 2*y^2.at n=25A106525The x members of the positive proper solutions (x = x2(n), y = y2(n)) of the second class for the Pell equation x^2 - 2*y^2 = +7^2.at n=8A275795Prime numbersat n=847690