Select the number that can replace the question mark (?) in the following series. 25, 26, 53, 160, 641, ?

The pattern is: 25×1+1=26, 26×2+1=53, 53×3+1=160, 160×4+1=641, 641×5+1=3206. Wait — 641×5=3205+1=3206. Re-checking: 25+1=26, 26×2=52+1=53, 53×3=159+1=160, 160×4=640+1=641, 641×5=3205+1=3206. But book answer is 3403. Checking another pattern: ×1+1, ×2+1, ×3+1, ×4+1, ×5+1=3206. Answer should be 3206 based on pattern.