| n | a(n) |
|---|---|
| 1 | 13 |
| 2 | 571 |
| 3 | 5306 |
| 4 | 26470 |
| 5 | 93455 |
| 6 | 264313 |
| 7 | 640276 |
| 8 | 1383276 |
| 9 | 2736465 |
| 10 | 5047735 |
| 11 | 8796238 |
| 12 | 14621906 |
| 13 | 23357971 |
| 14 | 36066485 |
| 15 | 54076840 |
| 16 | 79027288 |
| 17 | 112909461 |
| 18 | 158115891 |
| 19 | 217490530 |
| 20 | 294382270 |
| 21 | 392701463 |
| 22 | 516979441 |
| 23 | 672431036 |
| 24 | 865020100 |
| 25 | 1101528025 |
| 26 | 1389625263 |
| 27 | 1737945846 |
| 28 | 2156164906 |
[13,571,5306,26470,93455,264313,640276,1383276, 2736465,5047735,8796238,14621906,23357971, 36066485,54076840,79027288,112909461,158115891, 217490530,294382270,392701463,516979441,672431036, 865020100,1101528025,1389625263,1737945846, 2156164906] |