Timeline for Divisibility question while enumerating endomorphisms: PART 2
Current License: CC BY-SA 4.0
5 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Dec 29, 2020 at 17:16 | vote | accept | T. Amdeberhan | ||
| Dec 29, 2020 at 17:04 | comment | added | T. Amdeberhan | @NoamD.Elkies: thanks for the references which I was aware of. I agree with your mod 3 comments. I also think that no such behavior occurs for other primes. | |
| Dec 29, 2020 at 16:31 | comment | added | Noam D. Elkies | This is sequence 248 in the OEIS (oeis.org/A000248), which gives some further information including the exponential generating function $\exp(x \exp(x))$ and some references and further interpretations. Possibly one of those might lead to a proof. For what it's worth $c_2 = 3$ seems to be the only multiple of $3$, and I don't see a pattern in the valuation at $5$ and $7$. | |
| Dec 28, 2020 at 20:48 | answer | added | Fedor Petrov | timeline score: 4 | |
| Dec 28, 2020 at 15:11 | history | asked | T. Amdeberhan | CC BY-SA 4.0 |