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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 16 |
| 3 | 102 |
| 4 | 940 |
| 5 | 9072 |
| 6 | 101036 |
| 7 | 1231650 |
| 8 | 16436824 |
| 9 | 237255370 |
| 10 | 3684061372 |
| 11 | 61152471648 |
| 12 | 1079792961548 |
| 13 | 20191392448058 |
| 14 | 398344602963240 |
| 15 | 8263930584283206 |
| 16 | 179759826117751524 |
| 17 | 4089350929606635216 |
[2,16,102,940,9072,101036,1231650,16436824, 237255370,3684061372,61152471648,1079792961548, 20191392448058,398344602963240,8263930584283206, 179759826117751524,4089350929606635216] |