What is the sum of the following sequence:
Σ(-1)^(k+1) (2k-1)^2 for k=1...n
for different n?
Additional test cases have been added.
Please check your test suites, results must have opposite signs.
Thanks! The problem now is reformulated;)
How long is the longest prime diagonal?
Find nearest prime number less than input number
Determine the length of a string of characters
Area of a circle
Summation of array
Sum of series II
Sum of series III
Sum of series V
Sum of series I
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