Pattern Recognition - 104

Find out the next two numbers in the series.
12,44, 140, 428, _,_,.........


Answer
 
Tn+1 = (Tn *3) +8

44=(12 * 3) +8
140=(44* 3)  +8
428=(140*3)+8

Next two numbers  (428 *3) + 8 = 1284 + 8 =1292
                           (1292*3) + 8 = 3876 +8  =3884

12,44, 140, 428, 1292, 3884,.........