Alexander Molnar b7e6591a6c Added content to factorial stub (#34330) ... * Added content to stub Added definition, examples and some uses as well as computational info and interesting formulas that occur. * Update index.md		2019-03-12 01:04:42 +05:30
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index.md	Added content to factorial stub (#34330)	2019-03-12 01:04:42 +05:30