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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 10 |
| 6 | 1 |
| 7 | 225 |
| 8 | 21 |
| 9 | 489 |
| 10 | 29 |
| 11 | 740785 |
| 12 | 43 |
| 13 | 83120346 |
| 14 | 2144 |
| 15 | 111382 |
| 16 | 200683 |
| 17 | 2789144166880 |
| 18 | 6270 |
| 19 | 764582487395121 |
| 20 | 658073 |
| 21 | 4282119239 |
| 22 | 88713109 |
| 23 | 111056404320064218961 |
| 24 | 2040581 |
| 25 | 3557587238290412640 |
| 26 | 36510389904 |
[1,1,1,1,10,1,225,21,489,29,740785,43,83120346, 2144,111382,200683,2789144166880,6270, 764582487395121,658073,4282119239,88713109, 111056404320064218961,2040581,3557587238290412640, 36510389904] |