Question

find the sequence 1,4,18,84,440,?​

Answer 1

Step-by-step explanation:

1*1=1

2*2=4

3*3=18

4*4=84

5*5=440

Answer 2

The last number in the sequence will be 2760.

Step-by-step explanation:

The last number in the sequence can be found out as follows:

1 x 1 = 1 + 1 = 2

2 x 2 = 4 + 2 = 6

6 x 3 = 18 + 3 = 21

21 x 4 = 84 + 4 = 88

88 x 5 = 440 + 5 = 445

445 x 6 = 2760.