Pattern Recognition - 216

Find out the next number in the series.

34 , 3412 , 42,426 , 53 , 5515,_ ,.........

Answer

34 ,  3412 ,  42, 426 ,  53 , 5515,_ ,.........

3 * 4 = 12

4 + 2 = 6

5 * 3 = 15   

There is a mistake in the question. It should be 53 , 5315

34 ,       42 ,       53

       +8        +11       +14  

Next number 53 +14 =67

34 , 3412 , 42,426 , 53 , 5315, 67 ,.........