Missing value
Level
1
Find the last number of the sequence above.
The answer is 176.
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The n th term of the sequence is given by a 1 = 1 1 and a n = 1 1 ( n − 1 ) + a n − 1 for n ≥ 2 . Therefore, a 6 = 1 1 ( 6 − 1 ) + 1 2 1 = 5 5 + 1 2 1 = 1 7 6 .