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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 9 |
| 3 | 106 |
| 4 | 1823 |
| 5 | 36821 |
| 6 | 932080 |
| 7 | 26666067 |
| 8 | 876727561 |
| 9 | 32137538059 |
| 10 | 1305168046976 |
| 11 | 57774609056649 |
| 12 | 2783202675369037 |
| 13 | 144453227105110782 |
| 14 | 8035192765567735275 |
| 15 | 476686201707606976317 |
| 16 | 30053582893540865299197 |
| 17 | 2005019178999976881804130 |
| 18 | 141111387620531900621281975 |
[1,9,106,1823,36821,932080,26666067,876727561, 32137538059,1305168046976,57774609056649, 2783202675369037,144453227105110782, 8035192765567735275,476686201707606976317, 30053582893540865299197,2005019178999976881804130, 141111387620531900621281975] |