A163915 Permutation A163355 applied thrice.
0, 1, 3, 2, 7, 5, 6, 4, 9, 8, 10, 11, 14, 13, 12, 15, 16, 17, 18, 19, 20, 21, 23, 22, 28, 29, 31, 30, 27, 25, 24, 26, 48, 51, 50, 49, 52, 53, 55, 54, 60, 61, 63, 62, 57, 59, 56, 58, 47, 46, 45, 44, 39, 37, 36, 38, 35, 34, 32, 33, 40, 41, 43, 42, 127, 125, 126, 124, 118, 117
Offset: 0