30349818domain: NAppears in sequencesNumerators of continued fraction convergents to sqrt(13).at n=24A041018Numerators of continued fraction convergents to sqrt(325).at n=4A041612x-values in the solution to x^2 - 13*y^2 = -1.at n=2A202155Integers b for which there exists an integer y < b such that b^2+1 divides y^4.at n=7A289390