Magic Hexagon

An arrangement of close-packed Hexagons containing the numbers 1, 2, ..., , where is the th Hex Number, such that the numbers along each straight line add up to the same sum. In the above magichexagon, each line (those of lengths 3, 4, and 5) adds up to 38. This is the only magic hexagon of the counting numbers forany size hexagon. It was discovered by C. W. Adams, who worked on the problem from 1910 to 1957.

References

Beeler, M.; Gosper, R. W.; and Schroeppel, R. HAKMEM. Cambridge, MA: MIT Artificial Intelligence Laboratory, Memo AIM-239, Item 49, Feb. 1972.

Gardner, M. ``Permutations and Paradoxes in Combinatorial Mathematics.'' Sci. Amer. 209, 112-119, Aug. 1963.

Honsberger, R. Mathematical Gems I. Washington, DC: Math. Assoc. Amer., pp. 69-76, 1973.

Madachy, J. S. Madachy's Mathematical Recreations. New York: Dover, pp. 100-101, 1979.

• Binomial Expansion
• Binomial Formula
• Binomial Number
• Binomial Series
• Binomial Theorem
• Binomial Triangle
• Binormal Developable
• Binormal Vector
• Bioche's Theorem
• Biotic Potential
• Bipartite Graph
• Biplanar Double Point
• Bipolar Coordinates
• Bipolar Cylindrical Coordinates
• Biprism
• Bipyramid
• Biquadratefree
• Biquadratic Equation
• Biquadratic Number
• Biquadratic Reciprocity Theorem
• Biquaternion
• Birational Transformation
• Birch Conjecture
• Birch-Swinnerton-Dyer Conjecture
• Birkhoff's Ergodic Theorem