Timeline for Sum of the geometrico-factorial series
Current License: CC BY-SA 4.0
11 events
| when toggle format | what | by | license | comment | |
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| Aug 8, 2020 at 15:14 | answer | added | Alexandre Eremenko | timeline score: 3 | |
| Aug 8, 2020 at 8:29 | history | edited | user163402 | CC BY-SA 4.0 |
added 1 character in body
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| Aug 7, 2020 at 15:58 | comment | added | მამუკა ჯიბლაძე | Should be derivable easily from the recurrence$$nE_{n+1}(z)+zE_n(z)=e^{-z}$$ | |
| S Aug 7, 2020 at 11:49 | history | suggested | GohPiHan | CC BY-SA 4.0 |
LaTeX fix display
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| Aug 7, 2020 at 11:19 | review | Suggested edits | |||
| S Aug 7, 2020 at 11:49 | |||||
| Aug 7, 2020 at 6:36 | comment | added | მამუკა ჯიბლაძე |
Mathematica says that Sum[k! x^k, {k, 0, n-1}] is$$(-1/x)e^{-1/x}(E_1(-1/x)-n!x^nE_{n+1}(-1/x))$$
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| Aug 7, 2020 at 6:19 | comment | added | Gerry Myerson | Letting $x=1$, we get the sequence tabulated at oeis.org/A007489 and since there isn't any useful formula given there it's highly unlikely there is one for general $x$. | |
| Aug 7, 2020 at 6:16 | history | edited | YCor | CC BY-SA 4.0 |
removed capitals from title, added tag
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| Aug 7, 2020 at 5:37 | history | edited | user163402 | CC BY-SA 4.0 |
deleted 13 characters in body
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| Aug 7, 2020 at 4:07 | review | First posts | |||
| Aug 7, 2020 at 6:11 | |||||
| Aug 7, 2020 at 4:01 | history | asked | user163402 | CC BY-SA 4.0 |