One starts from the polynomial
      
      and extends one by one with
      
      until the final polynomial defining this rule is reached.
      Note: Polynomials might be truncated due to size!
      The complete polynomials are included in the download.
    
| Node (ball center) | Error (ball radius) | 
|---|---|
| 0.93969262078590838405 + 1.9551592726397469965e-149j | 1.19e-62, 1.19e-62j | 
| -0.7660444431189780352 + 6.1098727269992093641e-151j | 2.66e-62, 2.66e-62j | 
| -0.93969262078590838405 + 4.6614629570001292146e-156j | 1.18e-62, 1.18e-62j | 
| -0.17364817766693034885 - 4.1402108026390475844e-171j | 8.09e-64, 8.09e-64j | 
| 0.5 - 3.6665317535510399891e-198j | 7.39e-63, 7.39e-63j | 
| 0.7660444431189780352 - 8.3610891304336663809e-198j | 2.66e-62, 2.66e-62j | 
| 0.17364817766693034885 + 1.4585050254609393207e-210j | 8.09e-64, 8.09e-64j | 
| -0.5 + 1.5208732530361278588e-209j | 7.8e-63, 7.8e-63j | 
| Weight (ball center) | Error (ball radius) | 
|---|---|
| 0.0129975309378345536 - 3.057425610595851469e-150j | 3.09e-26, 3.86e-57j | 
| 0.045908434574059425064 - 4.482081694781318646e-151j | 1.32e-26, 1.65e-57j | 
| 0.0129975309378345536 + 1.8094872516765392053e-151j | 7.86e-27, 9.85e-58j | 
| 0.107760701154772688 - 1.7812646099703475123e-150j | 3.37e-27, 4.19e-58j | 
| 0.083333333333333333333 - 3.6653258023963146606e-150j | 2.33e-27, 2.96e-58j | 
| 0.045908434574059425064 + 5.1506667104827076858e-150j | 1.48e-27, 1.9e-58j | 
| 0.107760701154772688 + 2.6802884680286993266e-150j | 1.63e-27, 2.04e-58j | 
| 0.083333333333333333333 + 9.4032028876158457357e-151j | 1.05e-27, 1.19e-58j | 
All rules of Chebyshev U (second kind) type can be downloaded here packed into a single file.