High Quality Content by WIKIPEDIA articles! an be obtained by rearranging Stirling's extended formula and observing a coincidence between the resultant power series and the Taylor series expansion of the hyperbolic sine function. This approximation is good to more than 8 decimal digits for z with a real part greater than 8. Robert H. Windschitl suggested it in 2002 for computing the Gamma function with fair accuracy on calculators with limited program or register memory (see link 'Toth'). Gerg? Nemes proposed in 2007 an approximation which gives the same number of exact digits as the Windschitl approximation but is much simpler.

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