Minimum number k for which the digital sum of k*n is 2*n.

Terms

a(0) =0a(1) =2a(2) =2a(3) =2a(4) =2a(5) =11a(6) =8a(7) =11a(8) =11a(9) =11a(10) =299a(11) =209a(12) =74a(13) =146a(14) =407a(15) =533a(16) =623a(17) =587a(18) =1111a(19) =2621a(20) =29999a(21) =3809a(22) =20909a(23) =13043a(24) =29162a(25) =119999a(26) =38423a(27) =37037a(28) =178571a(29) =241031