The wrong term in the sequence 7, 28, 63, 124, 215, 342, 511 is :

The wrong term in the sequence 7, 28, 63, 124, 215, 342, 511 is :
[A]28
[B]7
[C]215
[D]124

28
The given sequence is based on the following pattern :
2^{3}-1 = 7
3^{3}-1 = \underline{26} , 28(not)
4^{3}-1 = 63
5^{3}-1 = 125-1 = 124
6^{3}-1 = 216-1 = 215 and so on.
∴ The wrong term is = 28.

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