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| n | a(n) |
|---|---|
| 0 | 3 |
| 1 | 11 |
| 2 | 59 |
| 3 | 371 |
| 4 | 2483 |
| 5 | 17051 |
| 6 | 118379 |
| 7 | 825731 |
| 8 | 5771363 |
| 9 | 40373291 |
| 10 | 282534299 |
| 11 | 1977503891 |
| 12 | 13841818643 |
| 13 | 96890604731 |
| 14 | 678227855819 |
| 15 | 4747575858851 |
| 16 | 33232973616323 |
| 17 | 232630643127371 |
| 18 | 1628413985330939 |
| 19 | 11398896347634611 |
[3,11,59,371,2483,17051,118379,825731,5771363, 40373291,282534299,1977503891,13841818643, 96890604731,678227855819,4747575858851, 33232973616323,232630643127371,1628413985330939, 11398896347634611] |