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MathNet 2014 Question 11

Math Olympiad Vault · MathNet 2014

Question 11

In a Word Finding game, a player tries to find a word in a $12 \times 12$ array of letters by looking at blocks of adjacent letters that are arranged horizontally, arranged vertically, or arranged diagonally. How many such 3-letter blocks are there in a given $12 \times 12$ array of letters?