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.
- Christoffel Symbol of the First Kind
- Christoffel Symbol of the Second Kind
- Chromatic Number
- Chromatic Polynomial
- Chu Identity
- Church's Theorem
- Church's Thesis
- Church-Turing Thesis
- Chu Space
- Chu-Vandermonde Identity
- Chvátal's Art Gallery Theorem
- Chvátal's Theorem
- ci
- Ci
- Cigarettes
- Cin
- Circle
- Circle Caustic
- Circle-Circle Intersection
- Circle Cutting
- Circle Evolute
- Circle Inscribing
- Circle Involute
- Circle Involute Pedal Curve
- Circle Lattice Points