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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 39 |
| 2 | 779 |
| 3 | 10621 |
| 4 | 111149 |
| 5 | 951899 |
| 6 | 6946342 |
| 7 | 44406362 |
| 8 | 253761833 |
| 9 | 1316306927 |
| 10 | 6272724030 |
| 11 | 27727887538 |
| 12 | 114598003169 |
| 13 | 445761614951 |
| 14 | 1641026089535 |
| 15 | 5744952627593 |
| 16 | 19204564723487 |
| 17 | 61521719896985 |
| 18 | 189464360814690 |
[1,39,779,10621,111149,951899,6946342,44406362, 253761833,1316306927,6272724030,27727887538, 114598003169,445761614951,1641026089535, 5744952627593,19204564723487,61521719896985, 189464360814690] |