I was thinking of the Shao Yang (binary) arrangement, rather than the original King Wen arrangement, which would have been created during SY's lifetime (1012-10

I was thinking of the Shao Yang (binary) arrangement, rather than the original King Wen arrangement, which would have been created during SY's lifetime (1012-1077). This is the version Leibniz examined [1]. But, yes, as you point out, if you go back to the King Wen version, even earlier. If only Leibniz was around today! [1] https://www.jstor.org/stable/1399337?seq=1#page_scan_tab_contents https://www.jstor.org/stable/1399337?seq=1#page_scan_tab_con...