70324domain: NAppears in sequencesExpansion of (1-4*x+7*x^2-5*x^3+4*x^4-6*x^5+21*x^6+18*x^7-5*x^8)/(1-x)^5.at n=19A212393a(n) = 108*n^2 - 104*n + 20 (n>=1).at n=25A304835