a(n) is the smallest positive multiple of n whose decimal digits are all 0, 1 or 2.

Terms

a(0) =1a(1) =2a(2) =12a(3) =12a(4) =10a(5) =12a(6) =21a(7) =112a(8) =12222a(9) =10a(10) =11a(11) =12a(12) =221a(13) =112a(14) =120a(15) =112a(16) =102a(17) =12222a(18) =1102a(19) =20a(20) =21a(21) =22a(22) =1012a(23) =120a(24) =100a(25) =1222a(26) =21222a(27) =112a(28) =1102a(29) =120