2 , 4 , 11, 44 , 219 , _ ,.....
Answer
2 , 4 , 11, 44 , 219, _ ,.....
(2*2) (4*3)-1 (11*4) (44*5)-1
Next number (219*6) = 1314
2 , 4 , 11, 44 , 219, 1314 ,..