908999091domain: NAppears in sequencesa(1) = 9; a(n) is the smallest multiple of a(n-1) that contains all the digits of a(n-1) and is not a multiple of 10.at n=5A077710a(1) =9, a(n) = smallest multiple of a(n-1) (not equal to 10^k*a(n-1)) obtained by inserting digits anywhere in a(n-1).at n=4A080494