20

18.0675

0.0675

40

18.016875

0.016875

4.00000000000021

80

18.00421875

0.00421875

4.00000000000000

160

18.001054687499998

0.001054687499998

4.00000000000674

320

18.000263671874997

0.000263671874997

4.00000000004042