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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1716 |
| 3 | 3057 |
| 4 | 18899 |
| 5 | 114323 |
| 6 | 649089 |
| 7 | 3562990 |
| 8 | 19473397 |
| 9 | 106720862 |
| 10 | 587093497 |
| 11 | 3242425329 |
| 12 | 17979553213 |
| 13 | 100111504811 |
| 14 | 559802224778 |
| 15 | 3143926483262 |
| 16 | 17734833870688 |
| 17 | 100488091104948 |
[1,1716,3057,18899,114323,649089,3562990,19473397, 106720862,587093497,3242425329,17979553213, 100111504811,559802224778,3143926483262, 17734833870688,100488091104948] |