A054278 Positions of 2's in the decimal expansion of exp(1).

1, 5, 9, 17, 23, 31, 34, 41, 63, 66, 88, 93, 99, 102, 112, 120, 132, 139, 146, 149, 163, 165, 168, 179, 183, 194, 217, 239, 253, 254, 274, 280, 298, 307, 317, 334, 342, 347, 359, 366, 372, 383, 392, 403, 411, 427