A103698 Add 6 to each of the preceding digits, beginning with 0.

0, 6, 12, 7, 8, 13, 14, 7, 9, 7, 10, 13, 15, 13, 7, 6, 7, 9, 7, 11, 7, 9, 13, 12, 13, 15, 13, 7, 7, 13, 15, 7, 9, 7, 8, 7, 9, 7, 11, 7, 9, 13, 13, 7, 9, 7, 11, 13, 15, 13, 14, 13, 15, 13, 7, 7, 13, 15, 7, 9, 7, 9, 13, 15, 13, 7, 7, 7, 9, 7, 11, 7, 9, 7, 10, 7, 9, 7, 11, 7, 9, 13, 13, 7, 9, 7, 11