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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 1 |
| 3 | 2 |
| 4 | 3 |
| 5 | 30 |
| 6 | 4 |
| 7 | 9 |
| 8 | 6469693230 |
| 9 | 212 |
| 10 | 200560490130 |
| 11 | 510511 |
| 12 | 2312 |
| 13 | 39 |
| 14 | 7799922041683461553249199106329813876687996789903550945093032474868511536164700810 |
| 15 | 7858321551080267055879092 |
| 16 | 6469693260 |
| 17 | 2566376117594999414479597815340071648394471 |
| 18 | 557940830126698960967415392 |
| 19 | 1062411448280052319722448549835623701226301211611796930357321893850294264731624591303255041960530 |
| 20 | 421 |
| 21 | 7420738134813 |
| 22 | 512820 |
| 23 | 3217644767340672907899084554132 |
| 24 | 249 |
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