Least k such that decimal representation of k*n contains only digits 0 and 8.

Terms

a(0) =8a(1) =4a(2) =296a(3) =2a(4) =16a(5) =148a(6) =1144a(7) =1a(8) =98765432a(9) =8a(10) =8a(11) =74a(12) =616a(13) =572a(14) =592a(15) =5a(16) =5224a(17) =49382716a(18) =4632a(19) =4a(20) =3848a(21) =4a(22) =38296a(23) =37a(24) =32a(25) =308a(26) =326255144a(27) =286a(28) =303752a(29) =296