Timeline for Number of partitions whose blocks form arithmetic progressions
Current License: CC BY-SA 3.0
9 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Feb 19, 2014 at 6:22 | vote | accept | Bjørn Kjos-Hanssen | ||
| Feb 18, 2014 at 2:32 | answer | added | Lucia | timeline score: 11 | |
| Feb 17, 2014 at 17:19 | comment | added | Christian Stump | @PerAlexandersson That's true. But we are still discussing if we want to allow such "statistics". You are welcome to participate in the discussion, but here is not the right place for that... | |
| Feb 17, 2014 at 15:59 | comment | added | Per Alexandersson | @ChristianStump: This is a subset of set partitions right? So, one can have a statistic that is 1 if all blocks are arithmetic progressions and 0 otherwise. | |
| Feb 17, 2014 at 14:33 | comment | added | Bjørn Kjos-Hanssen | @GerryMyerson yes | |
| Feb 17, 2014 at 10:57 | comment | added | Gerry Myerson | blocks of size 1 and 2 count as arithmetic progressions? | |
| Feb 17, 2014 at 9:18 | comment | added | Christian Stump | Here are some values for $A_n$ computed with a modern napkin: $1,2,5,13,37,111,359,1211$, which is oeis.org/A053732 (though the page doesn't contain any new information). @PerAlexandersson It's not really a statistic on a combinatorial collection, is it? | |
| Feb 17, 2014 at 8:42 | comment | added | Per Alexandersson | I suggest to add this statistic to findstat.org | |
| Feb 17, 2014 at 8:23 | history | asked | Bjørn Kjos-Hanssen | CC BY-SA 3.0 |