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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 2 |
| 4 | 13 |
| 5 | 184 |
| 6 | 4725 |
| 7 | 188596 |
| 8 | 10765407 |
| 9 | 829780846 |
| 10 | 82924007284 |
| 11 | 10420182259194 |
| 12 | 1607406366386249 |
| 13 | 298555458341808338 |
| 14 | 65711158773953092780 |
| 15 | 16910051487116790543954 |
| 16 | 5030141451818448773854244 |
| 17 | 1712632076858599057432066794 |
[1,1,2,13,184,4725,188596,10765407,829780846, 82924007284,10420182259194,1607406366386249, 298555458341808338,65711158773953092780, 16910051487116790543954,5030141451818448773854244, 1712632076858599057432066794] |