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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 23 |
| 5 | 43 |
| 6 | 251 |
| 7 | 263 |
| 8 | 21013 |
| 9 | 1407079 |
| 10 | 4919311 |
| 11 | 818778281 |
| 12 | 2402234557 |
| 13 | 379757743297 |
| 14 | 3325743954311 |
| 15 | 54237719914087 |
| 16 | 903944329576111 |
| 17 | 46919460458733911 |
| 18 | 367421942920402841 |
| 19 | 17148430651130576323 |
| 20 | 1236225057834436760243 |
| 21 | 4190310920096832376289 |
| 22 | 535482916756698482410061 |
[1,1,1,23,43,251,263,21013,1407079,4919311, 818778281,2402234557,379757743297,3325743954311, 54237719914087,903944329576111,46919460458733911, 367421942920402841,17148430651130576323, 1236225057834436760243,4190310920096832376289, 535482916756698482410061] |