The 19 numbers 1..19 in the following hexagonal array sum to the same total
(38) in any straight line  -- i.e. this is a magic hexagon.

	THERE IS NO OTHER MAGIC HEXAGON OF ANY OTHER SIZE > 1 !

                             ^     ^     ^          
                            / \   / \   / \         
                           /   \ /   \ /   \        
                          .     v     v     .       
                          | 18  | 17  |  3  |       
                          ^     ^     ^     ^       
                         / \   / \   / \   / \      
                        /   \ /   \ /   \ /   \     
                       .     v     v     v     .    
                       | 11  |  1  |  7  | 19  |    
                       ^     ^     ^     ^     ^    
                      / \   / \   / \   / \   / \   
                     /   \ /   \ /   \ /   \ /   \  
                    .     v     v     v     v     . 
                    |  9  |  6  |  5  |  2  | 16  | 
                    .     ^     ^     ^     ^     . 
                     \   / \   / \   / \   / \   /  
                      \ /   \ /   \ /   \ /   \ /   
                       v     v     v     v     v    
                       | 14  |  8  |  4  | 12  |    
                       .     ^     ^     ^     .    
                        \   / \   / \   / \   /     
                         \ /   \ /   \ /   \ /      
                          v     v     v     v       
                          | 15  | 13  | 10  |       
                          .     ^     ^     .       
                           \   / \   / \   /        
                            \ /   \ /   \ /         
                             v     v     v