2205405829domain: NAppears in sequencesExpansion of 1/(1 - 11*x + x^2).at n=9A004190Denominators of continued fraction convergents to sqrt(117).at n=19A041213Denominators of continued fraction convergents to sqrt(468).at n=25A041893a(n) = U(n, (n+2)/2) where U(n, x) is a Chebyshev polynomial of the 2nd kind.at n=9A342167