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| n | a(n) |
|---|---|
| 0 | 3 |
| 1 | 11 |
| 2 | 36 |
| 3 | 117 |
| 4 | 375 |
| 5 | 1197 |
| 6 | 3810 |
| 7 | 12112 |
| 8 | 38478 |
| 9 | 122198 |
| 10 | 388008 |
| 11 | 1231911 |
| 12 | 3911097 |
| 13 | 12416751 |
| 14 | 39419610 |
| 15 | 125145175 |
| 16 | 397296363 |
| 17 | 1261288403 |
| 18 | 4004182620 |
| 19 | 12711979296 |
| 20 | 40356397332 |
| 21 | 128118414852 |
| 22 | 406734209280 |
| 23 | 1291248512101 |
| 24 | 4099293000471 |
| 25 | 13013918567075 |
[3,11,36,117,375,1197,3810,12112,38478,122198, 388008,1231911,3911097,12416751,39419610, 125145175,397296363,1261288403,4004182620, 12711979296,40356397332,128118414852,406734209280, 1291248512101,4099293000471,13013918567075] |