A054312 Positions of 6's in the decimal expansion of Euler's constant.

7, 8, 17, 19, 21, 59, 68, 72, 76, 77, 79, 84, 89, 96, 103, 122, 132, 138, 148, 156, 178, 201, 215, 217, 231, 232, 238, 279, 282, 283, 289, 311, 326, 346, 383, 392, 401, 403, 417, 432, 475, 476, 485, 489, 490, 505