Minimum number k for which the digital sum of k*n is 6*n.

Terms

a(0) =0a(1) =6a(2) =24a(3) =33a(4) =222a(5) =1599a(6) =3333a(7) =11427a(8) =87486a(9) =111111a(10) =6999999a(11) =6090909a(12) =24999999a(13) =69076923a(14) =357142857a(15) =3333333333a(16) =6249999993a(17) =29411764647a(18) =111111111111a(19) =421047368421