>> cc_test

CC_TEST:
  Clenshaw-Curtis rules of increasing order.

   N     Q(N)      Err(N)

   1     -2.053482      0.805799
   2      3.141593       4.38928
   3     -0.321790      0.925892
   4     -2.307641       1.05996
   5     -0.953471      0.294212
   6     -1.181463     0.0662196
   7     -1.275942     0.0282595
   8     -1.248193    0.00050976
   9     -1.247501   0.000182074
  10     -1.247888    0.00020494
  11     -1.247596   8.65942e-05
  12     -1.247653   3.00652e-05
  13     -1.247685   2.11656e-06
  14     -1.247684   1.08994e-06
  15     -1.247684   7.76059e-07
  16     -1.247683   2.54566e-07
  17     -1.247683   9.23063e-08
  18     -1.247683   3.71632e-08
  19     -1.247683   6.31647e-10
  20     -1.247683   7.68055e-10
  21     -1.247683   8.92376e-10