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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 4001 |
| 3 | 261505 |
| 4 | 16773633 |
| 5 | 1073490145 |
| 6 | 68702054721 |
| 7 | 4396923919617 |
| 8 | 281403077821441 |
| 9 | 18009795930773137 |
| 10 | 1152626873213807201 |
| 11 | 73768115566393606785 |
| 12 | 4721159119167361543169 |
| 13 | 302154165890141908970689 |
[1,4001,261505,16773633,1073490145,68702054721, 4396923919617,281403077821441,18009795930773137, 1152626873213807201,73768115566393606785, 4721159119167361543169,302154165890141908970689] |