Pattern Recognition - 250

Find out the next number in the series.

25 , 57 , 107 , 221 ,_ ,.............

Answer

25 , 57 , 107 , 221 ,_ ,...............

57 = (25 * 2 ) + 7

107 = (57 * 2 ) - 7

221 = (107 * 2 ) + 7

Next number  (221 * 2 ) - 7 = 235

25 , 57 , 107 , 221 ,435 ,...............