Find the wrong number in the following series. (1, -3, -4, 1, 18, 60)

The pattern is: multiply position by increasing integers starting from 2, then subtract position number. Position 1: 1×2-1=1. Position 2: -3×3-2=-11 (but we have -3). Position 3: -4×4-3=-19 (but we have -4). Position 4: 1×5-4=1. Position 5: -4×6-5=-29 (but we have 18). Position 6: 18×7-6=120 (but we have 60). The last term should be 120, not 60.