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| n | a(n) |
|---|---|
| 1 | 13 |
| 2 | 105 |
| 3 | 126 |
| 4 | 454 |
| 5 | 1749 |
| 6 | 5464 |
| 7 | 17224 |
| 8 | 58861 |
| 9 | 190509 |
| 10 | 613009 |
| 11 | 2033562 |
| 12 | 6661058 |
| 13 | 21647463 |
| 14 | 71089634 |
| 15 | 233091249 |
| 16 | 761023933 |
| 17 | 2492107497 |
| 18 | 8165184140 |
| 19 | 26706741560 |
| 20 | 87408400302 |
| 21 | 286222682245 |
| 22 | 936714517961 |
| 23 | 3065727727972 |
| 24 | 10036183213622 |
[13,105,126,454,1749,5464,17224,58861,190509, 613009,2033562,6661058,21647463,71089634, 233091249,761023933,2492107497,8165184140, 26706741560,87408400302,286222682245,936714517961, 3065727727972,10036183213622] |