14760962domain: NAppears in sequencesa(n) = 8*a(n-1) - a(n-2), starting with a(0) = 2 and a(1) = 8.at n=8A086903A modified Engel expansion for 3*sqrt(15) - 11.at n=11A220337a(n) = 2 * T(n,n/2) where T(n,x) is a Chebyshev polynomial of the first kind.at n=8A343259a(0) = 8; for n > 0, a(n) = a(n-1)^2 - 2.at n=3A346625