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| n | a(n) |
|---|---|
| 1 | 16 |
| 2 | 256 |
| 3 | 1152 |
| 4 | 5371 |
| 5 | 30160 |
| 6 | 177488 |
| 7 | 1103081 |
| 8 | 6990922 |
| 9 | 45002090 |
| 10 | 291703403 |
| 11 | 1899852502 |
| 12 | 12403724792 |
| 13 | 81108030137 |
| 14 | 530824116234 |
| 15 | 3475943478340 |
| 16 | 22768311915069 |
| 17 | 149167204090078 |
| 18 | 977385748598970 |
| 19 | 6404564660109105 |
[16,256,1152,5371,30160,177488,1103081,6990922, 45002090,291703403,1899852502,12403724792, 81108030137,530824116234,3475943478340, 22768311915069,149167204090078,977385748598970, 6404564660109105] |