Pattern Recognition- 40

 Find the next two numbers in the series.

1 ,2 , 6 , 15 , 31 , 56 ,_ , _ .......

Answer

1  ,  2 ,    6 ,   15 ,  31 ,  56 ,
    +1   +4  +9    +16   +25

1= 1 *1
4=2 * 2
9=3 * 3
16=4 * 4
25=5 * 5

Next two numbers  56 + (6*6)  = 92
                             92 + (7 *7)= 141

1, 2 , 6 , 15 , 31 ,56 , 92 , 141 ,........