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| n | a(n) |
|---|---|
| 1 | 3 |
| 2 | 5 |
| 3 | 9 |
| 4 | 17 |
| 5 | 51 |
| 6 | 117 |
| 7 | 281 |
| 8 | 705 |
| 9 | 2115 |
| 10 | 6597 |
| 11 | 20105 |
| 12 | 60433 |
| 13 | 181299 |
| 14 | 555125 |
| 15 | 1688153 |
| 16 | 5101505 |
| 17 | 15304515 |
| 18 | 46132805 |
| 19 | 138926985 |
| 20 | 417770513 |
| 21 | 1253311539 |
| 22 | 3762126453 |
| 23 | 11293365145 |
| 24 | 33895137473 |
| 25 | 101685412419 |
| 26 | 305043012293 |
| 27 | 915147434121 |
[3,5,9,17,51,117,281,705,2115,6597,20105,60433, 181299,555125,1688153,5101505,15304515,46132805, 138926985,417770513,1253311539,3762126453, 11293365145,33895137473,101685412419,305043012293, 915147434121] |