The 64 hexagrams in a circle and a square, in the arrangement credited to Shao Yong (1011–1077). Joachim Bouvet sent this printed diagram from China to Leibniz, who added the Arabic numerals; he read the sequence as the numbers 0 to 63 in binary.Unknown printer; numerals by Gottfried Wilhelm Leibniz, about 1701 · Public domain · Wikimedia Commons
