Make a square matrix with this shape. For n=4
1 1 0 0
1 0 1 0
0 1 0 1
0 0 1 1
Determine if a Given Number is a Triangle Number
Detect a number and replace with two NaN's
02 - Vector Variables 3
04 - Scalar Equations 1
Derivative of polynomial
Altitude of locations on the earth
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