N

1

4

7

10

15

30

60

100

∞

${\zeta }_2\left(N\right)$

1.00000

1.42361

1.51180

1.54977

1.58044

1.61215

1.62841

1.63498

1.64493

$R_1^1\left(N\right)$

1.00000

1.42404

1.51180

1.54972

1.58044

1.61229

1.62867

1.63531

1.64536

Error%

0.00000

−0.03009

0.00000

0.00310

0.00000

−0.00917

−0.01645

−0.01991

−0.02578