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| n | a(n) |
|---|---|
| 1 | 87 |
| 2 | 267 |
| 3 | 792 |
| 4 | 2328 |
| 5 | 6915 |
| 6 | 20475 |
| 7 | 60588 |
| 8 | 179442 |
| 9 | 531306 |
| 10 | 1573062 |
| 11 | 4657767 |
| 12 | 13791129 |
| 13 | 40833855 |
| 14 | 120904779 |
| 15 | 357985743 |
| 16 | 1059956097 |
| 17 | 3138413982 |
| 18 | 9292498818 |
| 19 | 27514066965 |
| 20 | 81466129305 |
| 21 | 241212255042 |
| 22 | 714202974702 |
| 23 | 2114676514230 |
[87,267,792,2328,6915,20475,60588,179442,531306, 1573062,4657767,13791129,40833855,120904779, 357985743,1059956097,3138413982,9292498818, 27514066965,81466129305,241212255042,714202974702, 2114676514230] |