A054308 Positions of 2's in the decimal expansion of Euler's constant.

4, 15, 24, 30, 33, 39, 50, 61, 71, 91, 109, 117, 135, 139, 140, 152, 157, 168, 183, 186, 190, 193, 208, 223, 236, 239, 269, 272, 287, 293, 296, 310, 319, 324, 329, 351, 358, 367, 387, 400, 408, 421, 430, 431, 435