Talisman Hexagon
An 
-talisman hexagon is an arrangement of nested hexagons containing the integers 1, 2, ..., 
,where 
is the 
th Hex Number, such that the difference between all adjacent hexagons is at least as large as
. The hexagon illustrated above is a (3, 5)-talisman hexagon.
References
Madachy, J. S. Madachy's Mathematical Recreations. New York: Dover, pp. 111-112, 1979.
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