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| n | a(n) |
|---|---|
| 1 | 390 |
| 2 | 1769 |
| 3 | 8374 |
| 4 | 39928 |
| 5 | 190577 |
| 6 | 910169 |
| 7 | 4345011 |
| 8 | 20745372 |
| 9 | 99072051 |
| 10 | 473072354 |
| 11 | 2258928115 |
| 12 | 10786845653 |
| 13 | 51508637025 |
| 14 | 245959541842 |
| 15 | 1174491287887 |
| 16 | 5608355555142 |
| 17 | 26780628595266 |
| 18 | 127881076950311 |
| 19 | 610649258608125 |
[390,1769,8374,39928,190577,910169,4345011, 20745372,99072051,473072354,2258928115, 10786845653,51508637025,245959541842, 1174491287887,5608355555142,26780628595266, 127881076950311,610649258608125] |