Numbers n such that the decimal digits of n are not present in k*n, k=2..9.

Terms

a(0) =1a(1) =3a(2) =7a(3) =9a(4) =11a(5) =77a(6) =111a(7) =707a(8) =777a(9) =909a(10) =1111a(11) =7777a(12) =11111a(13) =70707a(14) =77777a(15) =90909a(16) =111111a(17) =777777a(18) =1111111a(19) =7070707a(20) =7777777a(21) =9090909a(22) =11111111a(23) =77777777a(24) =111111111a(25) =707070707a(26) =777777777a(27) =909090909a(28) =1111111111a(29) =7777777777