N

Trapezoidal error

Rate

Richardson’s extrap.

Rate

8

−0.0140244567175

0.0001333996544001792

16

−0.0034999397183

4.00705

8.232614749248413e−06

16.20380

32

−0.00087460023761

4.00175

5.129226172684298e−07

16.05040

64

−0.000218626035026

4.00043

3.203250420469317e−08

16.01256

128

−5.4655007526e−05

4.00010

2.0016397428435084e−09

16.00313