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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 14 |
| 3 | 119 |
| 4 | 852 |
| 5 | 6360 |
| 6 | 47334 |
| 7 | 351402 |
| 8 | 2609499 |
| 9 | 19373481 |
| 10 | 143810755 |
| 11 | 1067445448 |
| 12 | 7922843437 |
| 13 | 58803820979 |
| 14 | 436439347912 |
| 15 | 3239207207387 |
| 16 | 24040945903904 |
| 17 | 178428089506023 |
| 18 | 1324262997498462 |
| 19 | 9828446743250451 |
| 20 | 72944964878131496 |
[1,14,119,852,6360,47334,351402,2609499,19373481, 143810755,1067445448,7922843437,58803820979, 436439347912,3239207207387,24040945903904, 178428089506023,1324262997498462,9828446743250451, 72944964878131496] |