オイラーの魔方陣は、1から順に桂馬飛びに移動しながら64までを埋めていってできる魔方陣です。すごいねぇ。

Euler's magic square is an 8×8 magic square that is also a solution to the “knight's tour” problem. In other words, for any *i* (1 ≤ *i* ≤ 63), the positional relation between *i* and *i+1* is congruent with a knight's move on a chessboard.

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