24556909domain: NAppears in sequencesDenominators of continued fraction convergents to sqrt(293).at n=10A041551First differences of Chebyshev polynomials S(n,291) = A098248(n) with Diophantine property.at n=3A098250a(n) = 17*a(n-1) + a(n-2), with a(-1) = 0 and a(0) = 1.at n=7A178765