17433922005domain: NAppears in sequencesa(n) = 5*3^n.at n=20A005030Third column of triangle A067402.at n=11A067403a(0)=1, a(1)=5, a(n) = -3*a(n-1), n>1.at n=21A084244a(n) = (n^(n+1))*(n + 1)/2 = A000217(n)*A000312(n).at n=9A109391a(n) = n^10*(n + 1)/2.at n=9A170793