316373domain: NPropertiesPrimalityPrimeyesAppears in sequencesNumbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted the two central terms are both 48.at n=12A031636Number of positive solutions to (x_1)^2 + (x_2)^2 + ... + (x_5)^2 <= n^2.at n=16A341424Prime numbersat n=27305