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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 7 |
| 3 | 21 |
| 4 | 61 |
| 5 | 179 |
| 6 | 527 |
| 7 | 1561 |
| 8 | 4617 |
| 9 | 13667 |
| 10 | 40455 |
| 11 | 119765 |
| 12 | 354541 |
| 13 | 1049587 |
| 14 | 3107183 |
| 15 | 9198529 |
| 16 | 27231329 |
| 17 | 80615763 |
| 18 | 238655191 |
| 19 | 706515909 |
| 20 | 2091572621 |
| 21 | 6191900707 |
| 22 | 18330529343 |
| 23 | 54265778345 |
| 24 | 160648643833 |
| 25 | 475584938515 |
| 26 | 1407923702391 |
| 27 | 4168023401829 |
| 28 | 12339034453917 |
| 29 | 36528530817411 |
[1,3,7,21,61,179,527,1561,4617,13667,40455,119765, 354541,1049587,3107183,9198529,27231329,80615763, 238655191,706515909,2091572621,6191900707, 18330529343,54265778345,160648643833,475584938515, 1407923702391,4168023401829,12339034453917, 36528530817411] |