The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 5 |
| 3 | 1 |
| 4 | 35 |
| 5 | 15 |
| 6 | 1 |
| 7 | 315 |
| 8 | 215 |
| 9 | 30 |
| 10 | 1 |
| 11 | 3455 |
| 12 | 3325 |
| 13 | 725 |
| 14 | 50 |
| 15 | 1 |
| 16 | 44590 |
| 17 | 56605 |
| 18 | 17100 |
| 19 | 1825 |
| 20 | 75 |
| 21 | 1 |
| 22 | 660665 |
| 23 | 1060780 |
| 24 | 415555 |
| 25 | 60900 |
| 26 | 3850 |
| 27 | 105 |
| 28 | 1 |
| 29 | 11035095 |
| 30 | 21772595 |
| 31 | 10606470 |
| 32 | 1998605 |
| 33 | 172550 |
| 34 | 7210 |
| 35 | 140 |
| 36 | 1 |
| 37 | 204904830 |
| 38 | 486459105 |
| 39 | 286281665 |
| 40 | 66528210 |
| 41 | 7346955 |
| 42 | 417690 |
| 43 | 12390 |
| 44 | 180 |
| 45 | 1 |
[1,5,1,35,15,1,315,215,30,1,3455,3325,725,50,1, 44590,56605,17100,1825,75,1,660665,1060780,415555, 60900,3850,105,1,11035095,21772595,10606470, 1998605,172550,7210,140,1,204904830,486459105, 286281665,66528210,7346955,417690,12390,180,1] |