104203730401domain: NAppears in sequencesDenominators of continued fraction convergents to sqrt(143).at n=16A041263The general form of the recurrences are the a(j), b(j) and n(j) solutions of the 2 equations problem: 11*n(j) + 1 = a(j)*a(j) and 13*n(j) + 1 = b(j)*b(j), with positive integer numbers.at n=8A159664