-6399domain: ZAppears in sequencesa(n) = -(1/2)*(n+2)*(n^2 - 6*n - 1).at n=25A028494A symmetrical triangle sequence: T(n, k) = q^k + q^(n-k) - q^n, with q=3.at n=40A176225Inverse Euler transform of {1,0,1,0,0,0,...}.at n=32A320786