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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 10 |
| 3 | 276 |
| 4 | 14318 |
| 5 | 1214358 |
| 6 | 150910592 |
| 7 | 25454753376 |
| 8 | 5599142988564 |
| 9 | 1557618719594808 |
| 10 | 532482249378122738 |
| 11 | 218108013886160729600 |
| 12 | 105215894641522373026220 |
| 13 | 59025152558043462549357094 |
| 14 | 38095446968224172036448488814 |
| 15 | 27985301641485576224718954999962 |
[1,1,10,276,14318,1214358,150910592,25454753376, 5599142988564,1557618719594808,532482249378122738, 218108013886160729600,105215894641522373026220, 59025152558043462549357094, 38095446968224172036448488814, 27985301641485576224718954999962] |