1867934896domain: NAppears in sequencesNumerators of continued fraction convergents to sqrt(245).at n=17A041458a(n) = ((4+sqrt(5))*(2+sqrt(5))^n + (4-sqrt(5))*(2-sqrt(5))^n)/2.at n=14A163070Values of x such that x^2 = 5*y^2 + 11, where x and y are positive integers.at n=14A281064