382343domain: NAppears in sequencesNumerators of continued fraction convergents to sqrt(173).at n=8A041318a(n) = 13*a(n-1) + a(n-2), starting with a(0) = 2 and a(1) = 13.at n=5A088316a(n) = n^5 + 5*n^3 + 5*n.at n=13A261391