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.
Which doors are open?
Number of toolboxes?
What's Your BMI?
Is this triangle right-angled?
The Hitchhiker's Guide to MATLAB
Tune your guitar
Are you in or are you out?
Flip the bit
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