2168392031domain: NAppears in sequencesDenominators of continued fraction convergents to sqrt(323).at n=13A041611Chebyshev U(n,x) polynomial evaluated at x=18.at n=6A144128a(n) = 64*n^6 - 80*n^4 + 24*n^2 - 1.at n=18A242851a(n) = U(n, 3*n), where U(n, x) is the Chebyshev polynomial of the second kind.at n=6A349076