Timeline for A certain type of combinatorial identity, involving de Montmort numbers
Current License: CC BY-SA 4.0
2 events
| when toggle format | what | by | license | comment | |
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| Oct 8, 2021 at 8:53 | comment | added | Gerry Myerson | I think it's (4.15) on page 28 at the end of Section 4: The permanent, of Chapter 1. It looks a little different in the book: $$D_n=\sum_{r=0}^{n-1}(-1)^r{n\choose r}(n-r)^r(n-r-1)^{n-r}$$ | |
| Oct 8, 2021 at 1:05 | history | answered | Ira Gessel | CC BY-SA 4.0 |