Which among the given series does not follow a specific pattern?

24, 60, 120, 206, 336

206

24, 60, 120, 206, 336

Pattern followed here is :-

x³ - x

24, 60, 120, 206, 336

( 3³ - 3) , ( 4³ - 4), ( 5³ - 5) , ( 6³ - 6) , ( 7³ - 7 )

= ( 27 - 3), ( 64 - 4), ( 125 - 5), ( 216 - 6) , ( 343 - 7 )

= 24 , 60 , 120 , 210 , 336

So, 206 does not follows the pattern.