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| n | a(n) |
|---|---|
| 1 | 6 |
| 2 | 41 |
| 3 | 213 |
| 4 | 1283 |
| 5 | 7358 |
| 6 | 42604 |
| 7 | 246463 |
| 8 | 1427278 |
| 9 | 8257394 |
| 10 | 47782109 |
| 11 | 276548288 |
| 12 | 1600318316 |
| 13 | 9261110693 |
| 14 | 53594650946 |
| 15 | 310152403800 |
| 16 | 1794861048704 |
| 17 | 10386914552975 |
| 18 | 60109320907593 |
| 19 | 347854219621911 |
| 20 | 2013041621414557 |
[6,41,213,1283,7358,42604,246463,1427278,8257394, 47782109,276548288,1600318316,9261110693, 53594650946,310152403800,1794861048704, 10386914552975,60109320907593,347854219621911, 2013041621414557] |