Number Series Question

Find the next number in the below sequence
1, 2, 6, 21, 88, __?
Answer:

The Answer is 445.

The sequence is:

             1   - 1'st
 1 * 1 + 1 = 2   - 2'nd
 2 * 2 + 2 = 6   - 3'rd
 6 * 3 + 3 = 21  - 4'th
21 * 4 + 4 = 88  - 5'th
88 * 5 + 5 = 445

The 6'th term will be 445.

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