306634951domain: NAppears in sequencesDenominators of continued fraction convergents to sqrt(168).at n=13A041311Denominators of continued fraction convergents to sqrt(672).at n=13A042293Chebyshev polynomials of the second kind, U(n,x), evaluated at x=13.at n=7A097309a(n) = 64*n^6 - 80*n^4 + 24*n^2 - 1.at n=13A242851