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| n | a(n) |
|---|---|
| 1 | 16 |
| 2 | 162 |
| 3 | 1446 |
| 4 | 12474 |
| 5 | 106488 |
| 6 | 906120 |
| 7 | 7702668 |
| 8 | 65459016 |
| 9 | 556238664 |
| 10 | 4726531278 |
| 11 | 40162523382 |
| 12 | 341270401878 |
| 13 | 2899853256528 |
| 14 | 24640717614786 |
| 15 | 209377814555934 |
| 16 | 1779131166029946 |
| 17 | 15117684272558352 |
| 18 | 128458419414226920 |
[16,162,1446,12474,106488,906120,7702668,65459016, 556238664,4726531278,40162523382,341270401878, 2899853256528,24640717614786,209377814555934, 1779131166029946,15117684272558352, 128458419414226920] |