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| n | a(n) |
|---|---|
| 1 | 6 |
| 2 | 7 |
| 3 | 8 |
| 4 | 17 |
| 5 | 40 |
| 6 | 151 |
| 7 | 877 |
| 8 | 6835 |
| 9 | 19687 |
| 10 | 34502 |
| 11 | 46375 |
| 12 | 109057 |
| 13 | 1315376 |
| 14 | 1463921 |
| 15 | 33422711 |
| 16 | 117091367 |
| 17 | 436282342 |
| 18 | 542784031 |
| 19 | 550371662 |
| 20 | 5227148122 |
| 21 | 55251647224 |
[6,7,8,17,40,151,877,6835,19687,34502,46375, 109057,1315376,1463921,33422711,117091367, 436282342,542784031,550371662,5227148122, 55251647224] |