311204713domain: NAppears in sequencesDenominators of continued fraction convergents to sqrt(170).at n=6A041313Denominators of continued fraction convergents to sqrt(680).at n=6A042307Pell equation solutions (13*b(n))^2 - 170*a(n)^2 = -1 with b(n) = A097772(n), n >= 0.at n=3A097773