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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 9 |
| 3 | 1 |
| 4 | 54 |
| 5 | 20 |
| 6 | 378 |
| 7 | 307 |
| 8 | 21 |
| 9 | 2916 |
| 10 | 4280 |
| 11 | 966 |
| 12 | 24057 |
| 13 | 56914 |
| 14 | 27954 |
| 15 | 1485 |
| 16 | 208494 |
| 17 | 736568 |
| 18 | 650076 |
| 19 | 113256 |
| 20 | 1876446 |
| 21 | 9370183 |
| 22 | 13271982 |
| 23 | 5008230 |
| 24 | 225225 |
| 25 | 17399772 |
| 26 | 117822512 |
| 27 | 248371380 |
| 28 | 167808024 |
| 29 | 24635754 |
| 30 | 165297834 |
| 31 | 1469283166 |
| 32 | 4366441128 |
[1,2,9,1,54,20,378,307,21,2916,4280,966,24057, 56914,27954,1485,208494,736568,650076,113256, 1876446,9370183,13271982,5008230,225225,17399772, 117822512,248371380,167808024,24635754,165297834, 1469283166,4366441128] |