600940872domain: NAppears in sequencesDenominators of continued fraction convergents to sqrt(80).at n=15A041143a(n) = Fibonacci(6*n)/8.at n=8A049660Chebyshev polynomial of the second kind U[n,x] evaluated at x=n+2.at n=7A107995128*n^7-192*n^5+80*n^3-8*n.at n=9A242852