     n    m        integral          rel error    err const

     1    2   0.27540902998306D+00   0.5199E-01   0.2782D+00
     2    4   0.29012218422625D+00   0.1343E-02   0.5457D-01
     3    6   0.29050451350811D+00   0.2721E-04   0.9089D-02
     4    8   0.29051227564405D+00   0.4866E-06   0.1394D-02
     5   10   0.29051241467479D+00   0.8071E-08   0.2033D-03
     6   12   0.29051241698254D+00   0.1272E-09   0.2868D-04
     7   14   0.29051241701893D+00   0.1925E-11   0.3950D-05
     8   16   0.29051241701948D+00   0.2217E-13   0.5343D-06
     9   18   0.29051241701949D+00   0.8216E-14   0.7128D-07
    10   20   0.29051241701949D+00   0.7070E-14   0.9403D-08
