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Table 1 Simulations for \(\pmb{\alpha_{1}(n)}\) , \(\pmb{\alpha_{2}(n)}\) and \(\pmb{\beta (n)}\)

From: Approximation for the gamma function via the tri-gamma function

n

\(\boldsymbol{\frac{\alpha _{1}(n)-n!}{n!}}\)

\(\boldsymbol{\frac{\alpha _{2}(n)-n!}{n!}}\)

\(\boldsymbol{\frac{\beta (n)-n!}{n!}}\)

50

9.7924 × 10−19

1.1997 × 10−24

−7.0866 × 10−28

500

9.8013 × 10−28

1.2019 × 10−37

−7.1217 × 10−43

1000

1.9143 × 10−30

1.4672 × 10−41

−2.1734 × 10−47

2000

3.7389 × 10−33

1.7910 × 10−45

−6.63 × 10−52