Count the number of occurrences of "OXO" in rows, columns, diagonals and anti-diagonals.
>> board = ['OOX'
>> board = [' O '
Figurate number triangle
Triangle Numbers Below N
Back to basics 23 - Triangular matrix
middleAsColumn: Return all but first and last element as a column vector
Arithmetic/geometric sequence, 50/50
Another colon problem
Polite numbers. N-th polite number.
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