48225038405domain: NAppears in sequencesExpansion of (5-14*x+x^2)/((1-x)*(x^2-18*x+1)).at n=8A115032a(n) = sin^2((2n-1)*arcsin(sqrt n)) = 1 - sin^2( (2n-1)*arccos(sqrt n)).at n=5A173170