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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 3 |
| 3 | 14 |
| 4 | 108 |
| 5 | 1115 |
| 6 | 14800 |
| 7 | 239691 |
| 8 | 4602893 |
| 9 | 102442041 |
| 10 | 2596767156 |
| 11 | 73937412122 |
| 12 | 2338157235782 |
| 13 | 81358388835166 |
| 14 | 3090548185022616 |
| 15 | 127310130911561966 |
| 16 | 5654266354725389764 |
| 17 | 269396637045530725099 |
| 18 | 13708631585852580662781 |
| 19 | 742141584297248778501411 |
[1,1,3,14,108,1115,14800,239691,4602893,102442041, 2596767156,73937412122,2338157235782, 81358388835166,3090548185022616, 127310130911561966,5654266354725389764, 269396637045530725099,13708631585852580662781, 742141584297248778501411] |