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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 4 |
| 3 | 27 |
| 4 | 255 |
| 5 | 1 |
| 6 | 3094 |
| 7 | 1 |
| 8 | 30 |
| 9 | 45865 |
| 10 | 46 |
| 11 | 405 |
| 12 | 340 |
| 13 | 803424 |
| 14 | 659 |
| 15 | 3780 |
| 16 | 10710 |
| 17 | 4970 |
| 18 | 16239720 |
| 19 | 12867 |
| 20 | 48405 |
| 21 | 209440 |
| 22 | 178920 |
| 23 | 87864 |
| 24 | 372076163 |
| 25 | 284785 |
| 26 | 1225665 |
| 27 | 3005940 |
| 28 | 5457060 |
| 29 | 3558492 |
| 30 | 1812384 |
| 31 | 9529560676 |
| 32 | 7126384 |
| 33 | 32262300 |
| 34 | 51205700 |
| 35 | 135084600 |
| 36 | 120593340 |
| 37 | 81557280 |
| 38 | 42609720 |
[1,1,4,27,255,1,3094,1,30,45865,46,405,340,803424, 659,3780,10710,4970,16239720,12867,48405,209440, 178920,87864,372076163,284785,1225665,3005940, 5457060,3558492,1812384,9529560676,7126384, 32262300,51205700,135084600,120593340,81557280, 42609720] |