-37926domain: ZAppears in sequencesExpansion of 1/(1-x+2*x^2-x^3) in powers of x.at n=38A077954Expansion of 1/(1+x+2*x^2+x^3).at n=38A077979a(n) = Sum_{k=0..n} (-1)^k * binomial(n, k) * A000931(n-k+4).at n=20A144413a(n) = 2*a(n-1) - 3*a(n-2) + a(n-3), a(0) = 1, a(1) = 0, a(2) = -1.at n=27A233581