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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 1 |
| 6 | 1 |
| 7 | 17 |
| 8 | 21 |
| 9 | 669 |
| 10 | 1435 |
| 11 | 18879 |
| 12 | 48783 |
| 13 | 1539733 |
| 14 | 4958749 |
| 15 | 549583643 |
| 16 | 2274430177 |
| 17 | 407021932053 |
| 18 | 2127553253975 |
| 19 | 687811779125029 |
| 20 | 4505491241008645 |
| 21 | 2925616888695363409 |
| 22 | 24054886221768029249 |
[1,1,1,1,1,1,17,21,669,1435,18879,48783,1539733, 4958749,549583643,2274430177,407021932053, 2127553253975,687811779125029,4505491241008645, 2925616888695363409,24054886221768029249] |