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Assuming "fact" is a math function | Use as a word instead

Input:

    EnlargeData DownloadCustomize & Save ImageCopyable PlaintextEnable InteractivityDownload as CDFClip 'n Share
    RawBoxes[RowBox[{n, !}]] is the factorial function » | Documentation | Properties | Definition
    Save as image »Copyable plaintext »Mathematica form »

    Generating function:

    link to /input/?i=1%2F%281-t%29&lk=1&a=ClashPrefs_*Math-
    EnlargeData DownloadCustomize & Save ImageCopyable PlaintextEnable InteractivityDownload as CDFClip 'n Share

    Sequence properties:

    EnlargeData DownloadCustomize & Save ImageCopyable PlaintextEnable InteractivityDownload as CDFClip 'n Share

    Values:

    link to /input/?i=120&lk=1&a=ClashPrefs_*Math-link to /input/?i=720&lk=1&a=ClashPrefs_*Math-link to /input/?i=5040&lk=1&a=ClashPrefs_*Math-link to /input/?i=40320&lk=1&a=ClashPrefs_*Math-link to /input/?i=362880&lk=1&a=ClashPrefs_*Math-link to /input/?i=3628800&lk=1&a=ClashPrefs_*Math-
    EnlargeData DownloadCustomize & Save ImageCopyable PlaintextEnable InteractivityDownload as CDFClip 'n Share

    Alternate form:

    link to /input/?i=%CE%93%281%2Bn%29&lk=1&a=ClashPrefs_*Math-
    EnlargeData DownloadCustomize & Save ImageCopyable PlaintextEnable InteractivityDownload as CDFClip 'n Share
    RawBoxes[TemplateBox[{x}, Gamma]] is the gamma function » | Documentation | Properties | Definition

    Roots:

    EnlargeData DownloadCustomize & Save ImageCopyable PlaintextEnable InteractivityDownload as CDFClip 'n Share

    Series expansion at n=0:

    EnlargeData DownloadCustomize & Save ImageCopyable PlaintextEnable InteractivityDownload as CDFClip 'n Share
    RawBoxes[TemplateBox[{n, x}, PolyGamma2]] is the RawBoxes[SuperscriptBox[n, th]] derivative of the digamma function » | Documentation | Properties | Definition
    EulerGamma is the Euler‐Mascheroni constant » | Documentation | Definition

    Series expansion at n=∞:

    EnlargeData DownloadCustomize & Save ImageCopyable PlaintextEnable InteractivityDownload as CDFClip 'n Share
    RawBoxes[RowBox[{log, (, x, )}]] is the natural logarithm » | Documentation | Properties | Definition

    Derivative:

    link to /input/?i=%CE%93%281%2Bn%29+polygamma%280%2C+1%2Bn%29&lk=1&a=ClashPrefs_*Math-
    EnlargeData DownloadCustomize & Save ImageCopyable PlaintextEnable InteractivityDownload as CDFClip 'n Share
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