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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 22 |
| 2 | 311 |
| 3 | 3608 |
| 4 | 37485 |
| 5 | 363594 |
| 6 | 3368947 |
| 7 | 30231916 |
| 8 | 265060169 |
| 9 | 2283904766 |
| 10 | 19419219183 |
| 11 | 163405866624 |
| 12 | 1363677239653 |
| 13 | 11304693716338 |
| 14 | 93205539717419 |
| 15 | 765024499566932 |
| 16 | 6255874320057537 |
| 17 | 50996811157171110 |
[1,22,311,3608,37485,363594,3368947,30231916, 265060169,2283904766,19419219183,163405866624, 1363677239653,11304693716338,93205539717419, 765024499566932,6255874320057537, 50996811157171110] |