Composite numbers whose divisors (except 1) all contain the digit 9.

Terms

a(0) =1691a(1) =2291a(2) =3629a(3) =5191a(4) =5539a(5) =5597a(6) =6931a(7) =7391a(8) =7921a(9) =7961a(10) =8497a(11) =8791a(12) =9101a(13) =9329a(14) =9409a(15) =9481a(16) =9671a(17) =9701a(18) =10981a(19) =10991a(20) =11269a(21) =13129a(22) =13891a(23) =14239a(24) =15089a(25) =15931a(26) =15941a(27) =16999a(28) =17197a(29) =17309