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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 209 |
| 3 | 1121 |
| 4 | 2989 |
| 5 | 11381 |
| 6 | 34889 |
| 7 | 47701 |
| 8 | 62453 |
| 9 | 188785 |
| 10 | 878185 |
| 11 | 1761737 |
| 12 | 3931385 |
| 13 | 5630905 |
| 14 | 7990481 |
| 15 | 32892077 |
| 16 | 204570037 |
| 17 | 253223785 |
| 18 | 1353794333 |
| 19 | 2877954833 |
[1,209,1121,2989,11381,34889,47701,62453,188785, 878185,1761737,3931385,5630905,7990481,32892077, 204570037,253223785,1353794333,2877954833] |