92208005domain: NAppears in sequencesa(n) = 98*a(n-1)-a(n-2) for n>2, a(1)=1, a(2)=98.at n=4A173205a(n) = U_{2*n-1}(n)/(2*n) where U_{n}(x) is a Chebyshev polynomial of the second kind.at n=4A323181