In the following number-series one number is wrong. Find out that wrong number. $4 \quad 9 \quad 25 \quad 102 \quad 511 \quad 3071$

Analyzing the pattern: 4 to 9 (multiply by 2, add 1: 4*2+1=9), 9 to 25 (multiply by 3, subtract 2: 9*3-2=25), 25 to 102 (multiply by 4, add 2: 25*4+2=102), but expected would be 25*4+1=101 or 25*4+2=102 with different pattern. The correct pattern: multiply by increasing integers (2,3,4,5,6) with alternating +1, -2: 4*2+1=9, 9*3-2=25, 25*4+1=101, 101*5-2=503. So 102 is wrong.