Smallest k for which k, 2*k, ..., n*k all contain the digit 3.

Terms

a(0) =3a(1) =153a(2) =1153a(3) =1183a(4) =3465a(5) =7673a(6) =7673a(7) =7673a(8) =65913a(9) =65913a(10) =65913a(11) =76923a(12) =232767a(13) =232767a(14) =232767a(15) =232767a(16) =232767a(17) =2307767a(18) =2307767a(19) =2307767a(20) =2307767a(21) =3076923a(22) =6923313a(23) =17078903a(24) =19507893a(25) =56695913a(26) =56695913a(27) =113322666a(28) =113322666