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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 9 |
| 3 | 142 |
| 4 | 3639 |
| 5 | 147361 |
| 6 | 9205662 |
| 7 | 868687289 |
| 8 | 121564924269 |
| 9 | 24827487632524 |
| 10 | 7298473245637245 |
| 11 | 3051704700294366865 |
| 12 | 1796484203652704550216 |
| 13 | 1475854812473362457120271 |
| 14 | 1679123941097593174888995537 |
| 15 | 2628136437874738720379203091550 |
| 16 | 5626082456400367348667440806098859 |
[0,1,9,142,3639,147361,9205662,868687289, 121564924269,24827487632524,7298473245637245, 3051704700294366865,1796484203652704550216, 1475854812473362457120271, 1679123941097593174888995537, 2628136437874738720379203091550, 5626082456400367348667440806098859] |