A096682 Least k such that decimal representation of k*n contains only digits 0 and 3.

3, 15, 1, 75, 6, 5, 429, 375, 37, 3, 3, 25, 231, 2145, 2, 1875, 1959, 185, 1737, 15, 143, 15, 14361, 125, 12, 1155, 12345679, 10725, 113907, 1, 10743, 9375, 1, 9795, 858, 925, 9, 8685, 77, 75, 813, 715, 76821, 75, 74, 71805, 639, 625, 67347, 6, 653, 5775, 5661