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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 9 |
| 3 | 27 |
| 4 | 117 |
| 5 | 567 |
| 6 | 2673 |
| 7 | 11907 |
| 8 | 51597 |
| 9 | 222831 |
| 10 | 968841 |
| 11 | 4236219 |
| 12 | 18551781 |
| 13 | 81154791 |
| 14 | 354374433 |
| 15 | 1545091443 |
| 16 | 6729252957 |
| 17 | 29281369023 |
| 18 | 127304349273 |
| 19 | 552981937419 |
| 20 | 2399866971381 |
| 21 | 10405820054007 |
| 22 | 45080675201457 |
| 23 | 195138858704643 |
| 24 | 844014816147501 |
| 25 | 3647723547387663 |
| 26 | 15753283530001065 |
[1,3,9,27,117,567,2673,11907,51597,222831,968841, 4236219,18551781,81154791,354374433,1545091443, 6729252957,29281369023,127304349273,552981937419, 2399866971381,10405820054007,45080675201457, 195138858704643,844014816147501,3647723547387663, 15753283530001065] |