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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 10 |
| 3 | 213 |
| 4 | 8056 |
| 5 | 465945 |
| 6 | 37823616 |
| 7 | 4075467781 |
| 8 | 560230714240 |
| 9 | 95369455852497 |
| 10 | 19643693349548800 |
| 11 | 4805295720474420501 |
| 12 | 1374890520609054683136 |
| 13 | 454286686896040037996905 |
| 14 | 171479277693049020232695808 |
| 15 | 73262491601904459123264721125 |
| 16 | 35143072854722729593790081499136 |
[1,1,10,213,8056,465945,37823616,4075467781, 560230714240,95369455852497,19643693349548800, 4805295720474420501,1374890520609054683136, 454286686896040037996905, 171479277693049020232695808, 73262491601904459123264721125, 35143072854722729593790081499136] |