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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 3 |
| 3 | 30 |
| 4 | 892 |
| 5 | 76554 |
| 6 | 19138212 |
| 7 | 14126533902 |
| 8 | 31053145918644 |
| 9 | 204151364083796877 |
| 10 | 4021430292908836847748 |
| 11 | 237530957105884844479669995 |
| 12 | 42082478775006270167542801189164 |
| 13 | 22365250673182738144111737076795384386 |
[1,1,3,30,892,76554,19138212,14126533902, 31053145918644,204151364083796877, 4021430292908836847748, 237530957105884844479669995, 42082478775006270167542801189164, 22365250673182738144111737076795384386] |