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| n | a(n) |
|---|---|
| 0 | 8 |
| 1 | 43 |
| 2 | 253 |
| 3 | 1513 |
| 4 | 9073 |
| 5 | 54433 |
| 6 | 326593 |
| 7 | 1959553 |
| 8 | 11757313 |
| 9 | 70543873 |
| 10 | 423263233 |
| 11 | 2539579393 |
| 12 | 15237476353 |
| 13 | 91424858113 |
| 14 | 548549148673 |
| 15 | 3291294892033 |
| 16 | 19747769352193 |
| 17 | 118486616113153 |
| 18 | 710919696678913 |
| 19 | 4265518180073473 |
| 20 | 25593109080440833 |
[8,43,253,1513,9073,54433,326593,1959553,11757313, 70543873,423263233,2539579393,15237476353, 91424858113,548549148673,3291294892033, 19747769352193,118486616113153,710919696678913, 4265518180073473,25593109080440833] |