The th Beraha constant is given by

The first few are

They appear to be Roots of the Chromatic Polynomials of planar triangular Graphs. is , where is the Golden Ratio, and is the Silver Constant.

**References**

Le Lionnais, F. *Les nombres remarquables.* Paris: Hermann, p. 143, 1983.

© 1996-9

1999-05-26