In the series 2, 3, 4, 11, 48, 389, the number 3 doesn't fit the underlying pattern. A possible pattern with 3 removed: 2^2 - 0 = 2 (or starting point), 4^2 - 5 = 11, 11^2 - 73 = 48, etc. Another interpretation: the series follows n x previous - k pattern where 3 breaks the sequence. The key is recognizing that 3 is the outlier.