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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 7 |
| 4 | 91 |
| 5 | 5144 |
| 6 | 1052251 |
| 7 | 706480081 |
| 8 | 1581055927702 |
| 9 | 12140606592270147 |
| 10 | 328173093539912361767 |
| 11 | 31831409057653120420337536 |
| 12 | 11234306829106179168513020426663 |
| 13 | 14576263867478482708779036941179024765 |
| 14 | 70075728362112833245095630646535639894359350 |
[1,1,2,7,91,5144,1052251,706480081,1581055927702, 12140606592270147,328173093539912361767, 31831409057653120420337536, 11234306829106179168513020426663, 14576263867478482708779036941179024765, 70075728362112833245095630646535639894359350] |