A358470 Number of 3's that appeared by n-th step when constructing A030717.
0, 0, 0, 0, 1, 3, 5, 6, 7, 7, 8, 11, 15, 18, 20, 23, 25, 27, 29, 31, 35, 39, 42, 45, 48, 51, 56, 61, 64, 67, 70, 73, 75, 78, 82, 88, 94, 101, 109, 117, 124, 133, 143, 155, 168, 181, 193, 207, 222, 237, 253, 269, 285, 302, 319, 337, 356, 375, 393, 412, 431, 450, 470, 491, 512, 533, 553, 573, 594, 615, 636, 657, 678
Offset: 1