function c = helmert_condition ( n )

%*****************************************************************************80
%
%% helmert_condition() returns the L1 condition of the HELMERT matrix.
%
%  Licensing:
%
%    This code is distributed under the MIT license.
%
%  Modified:
%
%    01 November 2021
%
%  Author:
%
%    John Burkardt
%
%  Input:
%
%    integer N, the order of A.
%
%  Output:
%
%    real C: the L1 condition number.
%
  A = helmert_matrix ( n );
  normA = norm ( A, 1 );
  B = helmert_inverse ( n );
  normB = norm ( B, 1 );
  c = normA * normB;

  return
end
