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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 14 |
| 3 | 160 |
| 4 | 2544 |
| 5 | 51888 |
| 6 | 1292208 |
| 7 | 38012448 |
| 8 | 1289847456 |
| 9 | 49593778368 |
| 10 | 2130914229312 |
| 11 | 101188640375040 |
| 12 | 5262325852773120 |
| 13 | 297450338175682560 |
| 14 | 18157597034693207040 |
| 15 | 1190483599149657584640 |
| 16 | 83433723762978141189120 |
| 17 | 6224485980052510972692480 |
[1,2,14,160,2544,51888,1292208,38012448, 1289847456,49593778368,2130914229312, 101188640375040,5262325852773120, 297450338175682560,18157597034693207040, 1190483599149657584640,83433723762978141189120, 6224485980052510972692480] |