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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 14 |
| 2 | 134 |
| 3 | 1132 |
| 4 | 9028 |
| 5 | 69848 |
| 6 | 531224 |
| 7 | 3999856 |
| 8 | 29936656 |
| 9 | 223244768 |
| 10 | 1661090912 |
| 11 | 12342768832 |
| 12 | 91636134976 |
| 13 | 679979479424 |
| 14 | 5044125163904 |
| 15 | 37410199666432 |
| 16 | 277422140424448 |
| 17 | 2057118896434688 |
| 18 | 15253073982785024 |
| 19 | 113094845314640896 |
[1,14,134,1132,9028,69848,531224,3999856,29936656, 223244768,1661090912,12342768832,91636134976, 679979479424,5044125163904,37410199666432, 277422140424448,2057118896434688, 15253073982785024,113094845314640896] |