Počet obdélníků zakrývajících dané políčko čtvercové sítě
Rozhledy matematicko-fyzikální, Tome 89 (2014) no. 1, pp. 1-4
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The article deals with the number of rectangles by which every square of $n \times n$ chessboard is covered. Then, the sum of all these numbers is given.
The article deals with the number of rectangles by which every square of $n \times n$ chessboard is covered. Then, the sum of all these numbers is given.