function [ n_data, j1, j2, j3, m1, m2, m3, fx ] = clebsch_gordan_values ( ...
  n_data )

%*****************************************************************************80
%
%% CLEBSCH_GORDAN_VALUES returns some values of the Clebsch-Gordan function.
%
%  Discussion:
%
%    In Mathematica, the function can be evaluated by:
%
%      ClebschGordan[{j1,m1},{j2,m2},{j3,m3}]
%
%  Licensing:
%
%    This code is distributed under the GNU LGPL license.
%
%  Modified:
%
%    09 February 2007
%
%  Author:
%
%    John Burkardt
%
%  Reference:
%
%    Milton Abramowitz, Irene Stegun,
%    Handbook of Mathematical Functions,
%    National Bureau of Standards, 1964,
%    ISBN: 0-486-61272-4,
%    LC: QA47.A34.
%
%    Stephen Wolfram,
%    The Mathematica Book,
%    Fourth Edition,
%    Cambridge University Press, 1999,
%    ISBN: 0-521-64314-7,
%    LC: QA76.95.W65.
%
%  Parameters:
%
%    Input/output, integer N_DATA.  The user sets N_DATA to 0 before the
%    first call.  On each call, the routine increments N_DATA by 1, and
%    returns the corresponding data; when there is no more data, the
%    output value of N_DATA will be 0 again.
%
%    Output, real J1, J2, J3, M1, M2, M3, the arguments
%    of the function.
%
%    Output, real FX, the value of the function.
%
  n_max = 12;

  fx_vec(1:n_max) = [ ...
     0.7071067811865475, ...
     1.000000000000000, ...
     0.5773502691896258, ...
    -0.2581988897471611, ...
    -0.6324555320336759, ...
    -0.7745966692414834, ...
     0.4082482904638630, ...
     0.8164965809277260, ...
     0.5345224838248488, ...
     0.2672612419124244, ...
     0.8944271909999159, ...
     0.3380617018914066 ];
  j1_vec(1:n_max) = [ ...
    0.5, ...
    0.5, ...
    0.5, ...
    1.0, ...
    1.0, ...
    1.0, ...
    1.0, ...
    1.0, ...
    2.0, ...
    2.0, ...
    1.5, ...
    1.5 ];
  j2_vec(1:n_max) = [ ...
    0.5, ...
    0.5, ...
    1.0, ...
    1.5, ...
    1.5, ...
    1.5, ...
    1.0, ...
    1.0, ...
    2.0, ...
    2.0, ...
    2.0, ...
    2.0 ];
  j3_vec(1:n_max) = [ ...
    1.0, ...
    1.0, ...
    1.5, ...
    1.5, ...
    1.5, ...
    1.5, ...
    2.0, ...
    2.0, ...
    2.0, ...
    2.0, ...
    2.5, ...
    3.5 ];
  m1_vec(1:n_max) = [ ...
    0.5, ...
    0.5, ...
   -0.5, ...
    0.0, ...
   -1.0, ...
    0.0, ...
    1.0, ...
    0.0, ...
    2.0, ...
    1.0, ...
    0.5, ...
    1.5 ];
  m2_vec(1:n_max) = [ ...
   -0.5, ...
    0.5, ...
    1.0, ...
    0.5, ...
    1.5, ...
    1.5, ...
   -1.0, ...
    0.0, ...
   -2.0, ...
   -1.0, ...
    1.0, ...
   -1.0 ];
  m3_vec(1:n_max) = [ ...
    0.0, ...
    1.0, ...
    0.5, ...
    0.5, ...
    0.5, ...
    1.5, ...
    0.0, ...
    0.0, ...
    0.0, ...
    0.0, ...
    1.5, ...
    0.5 ];

  if ( n_data < 0 )
    n_data = 0;
  end

  n_data = n_data + 1;

  if ( n_max < n_data )
    n_data = 0;
    j1 = 0.0;
    j2 = 0.0;
    j3 = 0.0;
    m1 = 0.0;
    m2 = 0.0;
    m3 = 0.0;
    fx = 0.0;
  else
    j1 = j1_vec(n_data);
    j2 = j2_vec(n_data);
    j3 = j3_vec(n_data);
    m1 = m1_vec(n_data);
    m2 = m2_vec(n_data);
    m3 = m3_vec(n_data);
    fx = fx_vec(n_data);
  end

  return
end
