This work is licensed under a Creative Commons Attribution 4.0 International License. The magic hexagon was found in 1895 after much trial and error by William Radcliffe [radcliffe].
In 1963, Charles Trigg [trigg] proved that it is the only magic hexagon of any size (other than the trivial diameter 1) using a constraint on the sum of any diagonal.
See the related magic square and sequence problem entry.
[trigg]
Charles Trigg
howpublished: http://mathworld.wolfram.com/MagicHexagon.html
[radcliffe]
William Radcliffe
howpublished: https://www.johnrausch.com/PuzzleWorld/toc.php?t=_ndx/puz001.htm&m=ndx/puz000.htm
This work is licensed under a Creative Commons Attribution 4.0 International License.