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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 7 |
| 4 | 103 |
| 5 | 2461 |
| 6 | 85236 |
| 7 | 4017959 |
| 8 | 247296043 |
| 9 | 19273646845 |
| 10 | 1856844859198 |
| 11 | 216816668773915 |
| 12 | 30183137125497500 |
| 13 | 4940046471894678145 |
| 14 | 939290181452023884094 |
| 15 | 205341788464993702617408 |
[1,1,1,7,103,2461,85236,4017959,247296043, 19273646845,1856844859198,216816668773915, 30183137125497500,4940046471894678145, 939290181452023884094,205341788464993702617408] |