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Table 1 Comparison between inequalities ( 2.6 ) and ( 2.18 )

From: Further refinements of Gurland’s formula for π

n

δ n λ n

μ n ω n

2

0.00004326

0.00032062

10

8.22562801 × 10−10

1.24569373 × 10−7

100

8.37118328 × 10−17

1.26417115 × 10−12

1,000

8.64864687 × 10−24

1.26540403 × 10−17

10,000

8.37692558 × 10−31

1.2655212 × 10−22