-3359domain: ZAppears in sequencesLet f(0) = 0, f(1) = 1 and for n > 1 let f(n) = (-1)*sum((-1)^(n+r)*f(r),r=0..n-2)/(n*(n-1)); sequence gives numerator of f(n).at n=9A090295Expansion of (-3*x^2 + x - 1)/(x^3 - 3*x^2 + x - 1).at n=19A200715