25752063645domain: NAppears in sequencesDenominators of continued fraction convergents to sqrt(43).at n=29A041073Denominators of continued fraction convergents to sqrt(172).at n=23A041317Denominators of continued fraction convergents to sqrt(688).at n=17A042323y-values in the solution to x^2-43*y^2=1.at n=3A174780