The King Wen sequence, also known as the classical hexagram sequence, is sometimes considered the second–oldest formal arrangement of the hexagrams, preceded only by the Fu Hsi (伏羲) arrangement. Over the centuries there were many attempts to find an underlying mathematical structure to this pattern. J.M. Berger says: “My site is devoted to a personal obsession of mine — figuring out the logic that informs the King Wen sequence of the i-Ching. I hope you enjoy it.” His web site is Deciphering Wen.
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