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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 1 |
| 6 | 1 |
| 7 | 9 |
| 8 | 11 |
| 9 | 153 |
| 10 | 277 |
| 11 | 1847 |
| 12 | 3941 |
| 13 | 42907 |
| 14 | 102189 |
| 15 | 2677867 |
| 16 | 7544909 |
| 17 | 418620919 |
| 18 | 1424570893 |
| 19 | 112979816299 |
| 20 | 454603733387 |
| 21 | 48372707337627 |
| 22 | 228790897270887 |
| 23 | 42082899027578731 |
| 24 | 234640059600540451 |
[1,1,1,1,1,1,9,11,153,277,1847,3941,42907,102189, 2677867,7544909,418620919,1424570893,112979816299, 454603733387,48372707337627,228790897270887, 42082899027578731,234640059600540451] |