SOLUTION: What is the sum of the series 1^2 – 2^2 – 3^2 + 4^2 + 5^2 – 6^2 – 7^2 + 8^2 + … + 24^2?

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Question 314137: What is the sum of the series
1^2 – 2^2 – 3^2 + 4^2 + 5^2 – 6^2 – 7^2 + 8^2 + … + 24^2?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Check the pattern of the "-" and "+" multipliers in front of the square terms.
It's unclear what the pattern is for the numbers between 9 and 24.
1 +
2 -
3 -
4 +
5 +
6 -
7 -
8 +
9 +
.
.
.
24 +