Check whether the input matrix is a figurate number triangle: http://mathworld.wolfram.com/FigurateNumberTriangle.html
you should probably add a test case where the correct answer is false.
I added a few more tests as suggested.
Compute a dot product of two vectors x and y
Determine the number of odd integers in a vector
Create incrementing array
Sum of odd numbers in a matrix
Are you in or are you out?
Increment a number, given its digits
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