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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 2 |
| 3 | 2 |
| 4 | 4 |
| 5 | 11 |
| 6 | 14 |
| 7 | 57 |
| 8 | 100 |
| 9 | 1778 |
| 10 | 2355 |
| 11 | 7690 |
| 12 | 21334 |
| 13 | 89831 |
| 14 | 126718 |
| 15 | 365351 |
| 16 | 665175 |
| 17 | 914152 |
| 18 | 1469797 |
| 19 | 3554254 |
| 20 | 25042522 |
| 21 | 190651419 |
| 22 | 580715831 |
| 23 | 1803513148 |
| 24 | 3705699670 |
| 25 | 44927205487 |
| 26 | 232354919706 |
| 27 | 1600668490436 |
| 28 | 7538452976365 |
| 29 | 12294187702836 |
| 30 | 28817421277388 |
[2,2,2,4,11,14,57,100,1778,2355,7690,21334,89831, 126718,365351,665175,914152,1469797,3554254, 25042522,190651419,580715831,1803513148, 3705699670,44927205487,232354919706,1600668490436, 7538452976365,12294187702836,28817421277388] |