1, 5, 14, 30, 50, 55, 91?

The pattern is 12 , 12 + 22, 12 + 22 + 32, 12 + 22 + 32 + 42, 12 + 22 + 32 + 42 + 52, 12 + 22 + 32 + 42 + 52 + 62 . But 50 is not of this pattern.

Correct Answer: 50

Explanation:

The pattern is
1² ,
1² + 2²,
1² + 2² + 3²,
1² + 2² + 3² + 4²,
1² + 2² + 3² + 4² + 5²,
1² + 2² + 3² + 4² + 5² + 6² .
But 50 is not of this pattern.

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