Left factorials: Difference between revisions

Left factorials (view source)

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used a bold font for showing the symbols for left factorial in the task's preamble.

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Revision as of 02:55, 6 November 2019 (view source) Laurence (talk \| contribs) (Added Fōrmulæ) ← Older edit		Revision as of 03:02, 6 November 2019 (view source) rosettacode>Gerard Schildberger m (used a bold font for showing the symbols for left factorial in the task's preamble.) Newer edit →
Line 7: Sometimes,   ''subfactorials''   (also known as ''derangements'')   may use any of the notations: :::::::*   <big><big> <b> <span style="font-family:serif">!''n''`</span> </b> </big></big> :::::::*   <big><big> <b> <span style="font-family:serif">!''n''</span> </b> </big></big> :::::::*   <big><big> <b> <span style="font-family:serif">''n''¡</span> </b> </big></big> (It may not be visually obvious, but the last example uses an upside-down exclamation mark.)