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.
Convert a numerical matrix into a cell array of strings
Back to basics 19 - character types
Symmetry of vector
Sum of diagonals elements of a matrix
The Hitchhiker's Guide to MATLAB
Flip the bit
Right and wrong
Maintain shape of logical-index mask
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