  For motives associated with Fermat curves, there are elements in motivic
cohomology whose regulators are written in terms of special values of
generalized hypergeometric functions. Using them, we verify the Beilinson
conjecture numerically for some cases and find formulae for the values of
L-functions at 0. These appear analogous to the Chowla-Selberg formula for the
periods of elliptic curves with complex multiplication, which are related with
the L-values at 1 by the Birch and Swinnerton-Dyer conjecture.
