NISHIO Hirokazu[Translate]
階乗
n! \approx \left({n\over e}\right)^n = e^{n\log n - n}

Related Pages

"Engineer's way of creating knowledge" the English version of my book is now available on [Engineer's way of creating knowledge]
(C)NISHIO Hirokazu / Converted from [Scrapbox] at [Edit]