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| n | a(n) |
|---|---|
| 1 | 16 |
| 2 | 89 |
| 3 | 707 |
| 4 | 5610 |
| 5 | 45436 |
| 6 | 368247 |
| 7 | 2999288 |
| 8 | 24450441 |
| 9 | 199470500 |
| 10 | 1627847603 |
| 11 | 13287235058 |
| 12 | 108467239175 |
| 13 | 885493532143 |
| 14 | 7229102785596 |
| 15 | 59018758172819 |
| 16 | 481836050193261 |
| 17 | 3933783172023771 |
| 18 | 32116083219836091 |
| 19 | 262201568692536081 |
[16,89,707,5610,45436,368247,2999288,24450441, 199470500,1627847603,13287235058,108467239175, 885493532143,7229102785596,59018758172819, 481836050193261,3933783172023771, 32116083219836091,262201568692536081] |