A048301 Numbers whose base-4 expansions, read from left to right, have run lengths that strictly increase.
0, 1, 2, 3, 5, 10, 15, 16, 21, 26, 31, 32, 37, 42, 47, 48, 53, 58, 63, 64, 85, 106, 127, 128, 149, 170, 191, 192, 213, 234, 255, 256, 320, 341, 362, 383, 426, 511, 512, 597, 640, 661, 682, 703, 767, 768, 853, 938, 960, 981, 1002, 1023, 1024, 1045, 1066, 1087
Offset: 0