SpechtDimension(mu)
Calculates the dimension of  the Specht module S(mu),  which is
equal to the number of standard  mu-tableaux; the answer is given
by the hook length formula (see [JK]).
gap> SpechtDimension(6,3,2,1); 5632
See also SimpleDimension SimpleDimension. This function requires
the package ``specht'' (see RequirePackage).
GAP 3.4.4