Smallest multiple of n with least digit sum.

Terms

a(0) =1a(1) =10a(2) =3a(3) =100a(4) =10a(5) =12a(6) =1001a(7) =1000a(8) =9a(9) =10a(10) =11a(11) =12a(12) =1001a(13) =10010a(14) =30a(15) =10000a(16) =100000001a(17) =18a(18) =1000000001a(19) =100a(20) =21a(21) =110a(22) =100000000001a(23) =120a(24) =100a(25) =10010a(26) =27a(27) =100100a(29) =30a(30) =10000011