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| n | a(n) |
|---|---|
| 1 | 16 |
| 2 | 204 |
| 3 | 1844 |
| 4 | 13948 |
| 5 | 105862 |
| 6 | 850420 |
| 7 | 6953993 |
| 8 | 56279542 |
| 9 | 451637564 |
| 10 | 3624058880 |
| 11 | 29149448933 |
| 12 | 234656231134 |
| 13 | 1888292962943 |
| 14 | 15189590878387 |
| 15 | 122183775722351 |
| 16 | 982931386549726 |
| 17 | 7907698617955660 |
| 18 | 63616689428833346 |
| 19 | 511782089100478490 |
[16,204,1844,13948,105862,850420,6953993,56279542, 451637564,3624058880,29149448933,234656231134, 1888292962943,15189590878387,122183775722351, 982931386549726,7907698617955660, 63616689428833346,511782089100478490] |