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.
Count from 0 to N^M in base N.
Back to basics 18 - justification
Sophie Germain prime
02 - Vector Variables 2
High school cafeteria
Maintain shape of logical-index mask
Flip the bit
Factorize THIS, buddy
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