Pattern Recognition - 239

Find out the next number in the series.

14 , 17 , 18, 65 , 21, _,..................

Answer

14 , 17 , 18, 65 , 21, _,..................

17 = (1 * 1) + (4 * 4)

65 = (1 * 1) + (8 * 8)

Next number    ( 2 * 2 ) + (1 * 1) = 5

14 , 17 , 18, 65 , 21, 5 ,..................