Least k such that decimal representation of k*n contains only digits 0 and 2.

Terms

a(0) =2a(1) =1a(2) =74a(3) =5a(4) =4a(5) =37a(6) =286a(7) =25a(8) =24691358a(9) =2a(10) =2a(11) =185a(12) =154a(13) =143a(14) =148a(15) =125a(16) =1306a(17) =12345679a(18) =1158a(19) =1a(20) =962a(21) =1a(22) =9574a(23) =925a(24) =8a(25) =77a(26) =81563786a(27) =715a(28) =75938a(29) =74