A048304 Numbers whose base-7 expansions, read from left to right, have run lengths that strictly increase.
0, 1, 2, 3, 4, 5, 6, 8, 16, 24, 32, 40, 48, 49, 57, 65, 73, 81, 89, 97, 98, 106, 114, 122, 130, 138, 146, 147, 155, 163, 171, 179, 187, 195, 196, 204, 212, 220, 228, 236, 244, 245, 253, 261, 269, 277, 285, 293, 294, 302, 310, 318, 326, 334, 342, 343, 400, 457
Offset: 0