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.
Indexed Probability Table
Divisors of an integer
Cell Counting: How Many Draws?
Duplicate a character
Create an index-powered vector
All your base are belong to us
The Hitchhiker's Guide to MATLAB
Cull vector elements that contain a specified digit
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