Generate the first n terms of a periodic sequence defined as
f(x) = 0, 2, 0, -2, 0, 2, 0, -2, ..., for x = 1, 2, 3, 4, 5, 6, 7, 8, ...
Make a Palindrome Number
Back to basics 11 - Max Integer
Rotate a Matrix
Sum of reciprocals
Block average ignoring NaN values
Symbolic cody5 - Part I
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