28374454999domain: NAppears in sequencesDenominators of continued fraction convergents to sqrt(605).at n=21A042161Chebyshev polynomials S(n,123) + S(n-1,123) with Diophantine property.at n=5A097842a(n) = L(11*n)/L(n) where L(n) = A000204(n).at n=4A153179