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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 2 |
| 4 | 1 |
| 5 | 6 |
| 6 | 6 |
| 7 | 1 |
| 8 | 14 |
| 9 | 74 |
| 10 | 24 |
| 11 | 1 |
| 12 | 34 |
| 13 | 852 |
| 14 | 1880 |
| 15 | 120 |
| 16 | 1 |
| 17 | 78 |
| 18 | 10210 |
| 19 | 152922 |
| 20 | 80316 |
| 21 | 720 |
| 22 | 1 |
| 23 | 178 |
| 24 | 124466 |
| 25 | 13745475 |
| 26 | 62038644 |
| 27 | 5141864 |
| 28 | 5040 |
| 29 | 1 |
| 30 | 398 |
| 31 | 1539739 |
| 32 | 1301306034 |
| 33 | 55575194220 |
| 34 | 47286888510 |
| 35 | 458608016 |
| 36 | 40320 |
| 37 | 1 |
| 38 | 882 |
| 39 | 19271229 |
| 40 | 128342085219 |
[1,1,2,1,6,6,1,14,74,24,1,34,852,1880,120,1,78, 10210,152922,80316,720,1,178,124466,13745475, 62038644,5141864,5040,1,398,1539739,1301306034, 55575194220,47286888510,458608016,40320,1,882, 19271229,128342085219] |