-13125domain: ZAppears in sequencesExpansion of (1-25*x)^(3/5).at n=4A049391Expansion of (1-25*x)^(1/5).at n=4A049393a(n) = Sum_{k>=0} (-1)^k*binomial(n, 5*k+2).at n=17A289387a(n) = Sum_{k>=0} (-1)^k*binomial(n, 5*k+2).at n=18A289387