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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 4 |
| 4 | 3 |
| 5 | 13 |
| 6 | 9 |
| 7 | 302 |
| 8 | 207 |
| 9 | 43255 |
| 10 | 29601 |
| 11 | 58966432 |
| 12 | 40346163 |
| 13 | 1700782246897 |
| 14 | 1163704379409 |
| 15 | 687683872186748 |
| 16 | 470524470741039 |
| 17 | 209415712651415308217 |
| 18 | 143285523403473419397 |
| 19 | 552462361711804327497414320 |
[1,1,4,3,13,9,302,207,43255,29601,58966432, 40346163,1700782246897,1163704379409, 687683872186748,470524470741039, 209415712651415308217,143285523403473419397, 552462361711804327497414320] |