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| n | a(n) |
|---|---|
| 0 | 6 |
| 1 | 11 |
| 2 | 41 |
| 3 | 221 |
| 4 | 1301 |
| 5 | 7781 |
| 6 | 46661 |
| 7 | 279941 |
| 8 | 1679621 |
| 9 | 10077701 |
| 10 | 60466181 |
| 11 | 362797061 |
| 12 | 2176782341 |
| 13 | 13060694021 |
| 14 | 78364164101 |
| 15 | 470184984581 |
| 16 | 2821109907461 |
| 17 | 16926659444741 |
| 18 | 101559956668421 |
| 19 | 609359740010501 |
| 20 | 3656158440062981 |
| 21 | 21936950640377861 |
| 22 | 131621703842267141 |
[6,11,41,221,1301,7781,46661,279941,1679621, 10077701,60466181,362797061,2176782341, 13060694021,78364164101,470184984581, 2821109907461,16926659444741,101559956668421, 609359740010501,3656158440062981, 21936950640377861,131621703842267141] |