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| n | a(n) |
|---|---|
| 1 | 6 |
| 2 | 31 |
| 3 | 178 |
| 4 | 1011 |
| 5 | 5758 |
| 6 | 32771 |
| 7 | 186538 |
| 8 | 1061795 |
| 9 | 6043830 |
| 10 | 34402035 |
| 11 | 195819682 |
| 12 | 1114623859 |
| 13 | 6344543534 |
| 14 | 36113737251 |
| 15 | 205562777626 |
| 16 | 1170082606339 |
| 17 | 6660219918630 |
| 18 | 37910596295955 |
| 19 | 215790669012498 |
| 20 | 1228300722808403 |
[6,31,178,1011,5758,32771,186538,1061795,6043830, 34402035,195819682,1114623859,6344543534, 36113737251,205562777626,1170082606339, 6660219918630,37910596295955,215790669012498, 1228300722808403] |