A054300 Positions of 4's in the decimal expansion of sqrt(2).

2, 4, 18, 28, 51, 71, 74, 91, 96, 108, 121, 124, 141, 142, 146, 158, 200, 220, 223, 232, 239, 243, 263, 265, 271, 275, 296, 312, 324, 343, 345, 385, 388, 392, 395, 399, 418, 426, 427, 437, 439, 441, 449, 467, 511