Smallest multiple of n using only one nonzero digit.

Terms

a(0) =1a(1) =2a(2) =3a(3) =4a(4) =5a(5) =6a(6) =7a(7) =8a(8) =9a(9) =10a(10) =11a(11) =60a(12) =1001a(13) =70a(14) =30a(15) =80a(16) =11101a(17) =90a(18) =11001a(19) =20a(20) =777a(21) =22a(22) =110101a(23) =600a(24) =50a(25) =2002a(26) =999a(27) =700a(28) =1101101a(29) =30