The OEIS is supported by the many generous donors to the OEIS Foundation.
Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 1 |
| 4 | 15 |
| 5 | 9 |
| 6 | 1 |
| 7 | 105 |
| 8 | 60 |
| 9 | 27 |
| 10 | 18 |
| 11 | 1 |
| 12 | 945 |
| 13 | 525 |
| 14 | 450 |
| 15 | 150 |
| 16 | 135 |
| 17 | 30 |
| 18 | 1 |
| 19 | 10395 |
| 20 | 5670 |
| 21 | 4725 |
| 22 | 2250 |
| 23 | 1575 |
| 24 | 2700 |
| 25 | 405 |
| 26 | 300 |
| 27 | 405 |
| 28 | 45 |
| 29 | 1 |
| 30 | 135135 |
| 31 | 72765 |
| 32 | 59535 |
| 33 | 55125 |
| 34 | 19845 |
| 35 | 33075 |
| 36 | 15750 |
| 37 | 14175 |
| 38 | 3675 |
| 39 | 9450 |
| 40 | 2835 |
| 41 | 525 |
| 42 | 945 |
| 43 | 63 |
| 44 | 1 |
| 45 | 2027025 |
| 46 | 1081080 |
| 47 | 873180 |
| 48 | 793800 |
[1,3,1,15,9,1,105,60,27,18,1,945,525,450,150,135, 30,1,10395,5670,4725,2250,1575,2700,405,300,405, 45,1,135135,72765,59535,55125,19845,33075,15750, 14175,3675,9450,2835,525,945,63,1,2027025,1081080, 873180,793800] |