A358472 Number of 4's that appeared by n-th step when constructing A030717.
0, 0, 0, 0, 0, 0, 1, 2, 2, 3, 3, 3, 3, 4, 5, 5, 5, 5, 5, 6, 6, 6, 7, 8, 9, 11, 12, 12, 14, 16, 18, 21, 26, 31, 35, 38, 40, 43, 46, 49, 53, 57, 61, 65, 69, 73, 78, 83, 88, 93, 98, 104, 110, 116, 122, 128, 134, 140, 147, 154, 161, 168, 175, 182, 189, 196, 204, 212, 220, 228, 236, 245, 254, 263, 271, 279, 287, 295, 303, 311
Offset: 1