145746599domain: NAppears in sequencesDenominators of continued fraction convergents to sqrt(553).at n=21A042059The y member of the positive proper fundamental solution (x = x2(n), y = y2(n)) of the second class for the Pell equation x^2 - D(n)*y^2 = +8 for odd D(n) = A263012(n).at n=23A264353