pole                  residue

    1  3.14159265364309e+00  -1.00000000028333e+00
    2  9.42675965413364e+00  -1.00295747791527e+00
    3  1.66063154702243e+01  -1.56204667295638e+00
    4  4.63195086818196e+01  -1.44349958488449e+01