A080436 Smallest multiple of n obtained by inserting digits between every pair of digits of n. If n is a k-digit number then there are (k-1) places where digit insertion takes place and a(n) contains at least 2k-1 digits.

1, 2, 3, 4, 5, 6, 7, 8, 9, 100, 121, 132, 143, 154, 105, 176, 187, 108, 1159, 200, 231, 242, 253, 264, 225, 286, 297, 2128, 2059, 300, 341, 352, 363, 374, 315, 396, 3367, 3078, 3159, 400, 451, 462, 473, 484, 405, 4186, 4277, 4128, 4459, 500, 561, 572, 583, 594