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;)
Reverse the vector
subtract central cross
Sum of series III
Replace every 3rd element in a vector with 4
Sum of series VII
Sum of series VI
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