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| n | a(n) |
|---|---|
| 1 | 16 |
| 2 | 264 |
| 3 | 2088 |
| 4 | 10128 |
| 5 | 72890 |
| 6 | 656838 |
| 7 | 5122419 |
| 8 | 37600463 |
| 9 | 289559049 |
| 10 | 2273709869 |
| 11 | 17601007671 |
| 12 | 135453317086 |
| 13 | 1047572542859 |
| 14 | 8117117530202 |
| 15 | 62805502531884 |
| 16 | 485685199317233 |
| 17 | 3757783985932667 |
| 18 | 29079720700891755 |
| 19 | 225002521679562429 |
[16,264,2088,10128,72890,656838,5122419,37600463, 289559049,2273709869,17601007671,135453317086, 1047572542859,8117117530202,62805502531884, 485685199317233,3757783985932667, 29079720700891755,225002521679562429] |