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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 23 |
| 4 | 11 |
| 5 | 563 |
| 6 | 1627 |
| 7 | 88069 |
| 8 | 1423 |
| 9 | 1593269 |
| 10 | 7759469 |
| 11 | 31730711 |
| 12 | 46522243 |
| 13 | 3788707301 |
| 14 | 2888008157 |
| 15 | 340028535787 |
| 16 | 41743955887 |
| 17 | 10823198495797 |
| 18 | 2738032559863 |
| 19 | 409741429887649 |
| 20 | 25876414060339 |
| 21 | 17141894231615609 |
[1,1,23,11,563,1627,88069,1423,1593269,7759469, 31730711,46522243,3788707301,2888008157, 340028535787,41743955887,10823198495797, 2738032559863,409741429887649,25876414060339, 17141894231615609] |