The pattern is: ×8+1, ×7-2, ×6-3, ×5-4, ×4-5. Checking: 3.5×8+1=29, 29×7-2=201, 201×6-3=1203 (not 1209), 1203×5-4=6011 (not 6042), 6011×4-5=24039 (not 24169). The entire series after 201 appears corrupted. However, 6042 is flagged as wrong because it doesn't fit ×5-4 pattern from 1209, and subsequent terms are also inconsistent.