Magic Hexagon http://www.mathematische-basteleien.de/magichexagon.htm
The magic hexagon and its variants
W.Addams, a retired employee at a railway company from Philadelphia
The magic hexagon and its variants
W.Addams, a retired employee at a railway company from Philadelphia
Meine Sicht magischer Sechsecke
Clifford W.Addams, einem pensionierten Bahnbeamten aus Philadelphia