-2495domain: ZAppears in sequencesG.f.: 1/(1 - x^3 - 2 x^4 + x^5).at n=40A122517A symmetrical triangle sequence: T(n, k) = q^k + q^(n-k) - q^n, with q=5.at n=16A176226A symmetrical triangle sequence: T(n, k) = q^k + q^(n-k) - q^n, with q=5.at n=19A176226G.f. satisfies A(x) = 1 + x/(1 + x^3)^2 * A(x/(1 + x^3)).at n=14A360900