520127domain: NAppears in sequencesa(n)= 3*a(n-1) +a(n-2) -3*a(n-3) +a(n-4)+ 2*a(n-5) -a(n-6) -a(n-7).at n=16A107467Start with 100103 and repeatedly reverse the digits and add 2 to get the next term.at n=24A120218