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

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

1. 7
2. 28
3. 124
4. 215

Correct Option: B

The given sequence is based on the following Pattern :
2³ – 1 = 7
3³ – 1 = 28 is wrong term , hence 26 wil be correct number.
4³ – 1 = 63
5³ – 1 = 124
6³ – 1 = 215 and so on.
∴ The wrong term = 28