| n | a(n) |
|---|---|
| 1 | 3 |
| 2 | 7 |
| 3 | 21 |
| 4 | 59 |
| 5 | 163 |
| 6 | 447 |
| 7 | 1341 |
| 8 | 3905 |
| 9 | 11271 |
| 10 | 32357 |
| 11 | 92607 |
| 12 | 277821 |
| 13 | 820177 |
| 14 | 2408409 |
| 15 | 7047447 |
| 16 | 20576017 |
| 17 | 59979511 |
| 18 | 174642457 |
| 19 | 523927371 |
| 20 | 1555935031 |
| 21 | 4604936281 |
| 22 | 13597391065 |
| 23 | 40088645243 |
| 24 | 118057542207 |
| 25 | 347369262425 |
| 26 | 1021399936433 |
[3,7,21,59,163,447,1341,3905,11271,32357,92607, 277821,820177,2408409,7047447,20576017,59979511, 174642457,523927371,1555935031,4604936281, 13597391065,40088645243,118057542207,347369262425, 1021399936433] |