N

Simpson’s error

Rate

Richardson’s extrap.

Rate

4

0.0001333996544004

−7.579037909266617e−06

8

8.23261474947e−06

16.2038

−1.1185456050277764e−07

67.7579

16

5.12922617490e−07

16.0504

−1.7235246563274131e−09

64.8987

32

3.20325042046e−08

16.0125

−2.6836755040449134e−11

64.2225

64

2.001638854665e−09

16.0031

−4.1877612488860905e−13

64.0837