946043domain: NAppears in sequencesNumerators of continued fraction convergents to sqrt(53).at n=10A041090a(n) = 7*a(n-1) + a(n-2), starting with a(0) = 2 and a(1) = 7.at n=7A086902a(n) = n^7 + 7*n^5 + 14*n^3 + 7*n.at n=7A261540a(n) = L_n(n), where L_n(x) is the Lucas polynomial.at n=7A320570