A031305 Position of n-th 6 in A031298.
6, 22, 42, 62, 82, 102, 111, 113, 115, 117, 119, 121, 122, 123, 125, 127, 129, 142, 162, 182, 208, 238, 268, 298, 328, 358, 371, 374, 377, 380, 383, 386, 388, 389, 392, 395, 398, 418, 448, 478, 508, 538, 568, 598, 628, 658, 671
Offset: 1