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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 3 |
| 3 | 31 |
| 4 | 409 |
| 5 | 7361 |
| 6 | 170251 |
| 7 | 4732351 |
| 8 | 154694961 |
| 9 | 5814634753 |
| 10 | 246946119571 |
| 11 | 11698927124831 |
| 12 | 611660759515081 |
| 13 | 34984757221103041 |
| 14 | 2173041881789331099 |
| 15 | 145669007565799127551 |
| 16 | 10482025117382045382241 |
| 17 | 805892200757926620144641 |
[1,1,3,31,409,7361,170251,4732351,154694961, 5814634753,246946119571,11698927124831, 611660759515081,34984757221103041, 2173041881789331099,145669007565799127551, 10482025117382045382241,805892200757926620144641] |