Find the wrong number in the following number series. 77, 78, 159, 472, 1889, 9446, 56677

The pattern follows: multiply by 1 and add 1, multiply by 2 and add 2, multiply by 3 and add 3, etc. 77×1+1=78, 78×2+3=159, 159×3-5=472 (here we should add 4: 159×3+4=481, but 472 is given). The correct term after 159 should be 481 (159×3+4), not 472. Continuing: 472×4-1=1887 (should be 472×4+5=1893), 1889×5+1=9446, 9446×6-1=56675 (should be 9446×6+6=56682). The number 159 disrupts the pattern.