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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 1536 |
| 3 | 118098 |
| 4 | 2621440 |
| 5 | 29296875 |
| 6 | 211631616 |
| 7 | 1129900996 |
| 8 | 4831838208 |
| 9 | 17433922005 |
| 10 | 55000000000 |
| 11 | 155624547606 |
| 12 | 402462867456 |
| 13 | 965009442943 |
| 14 | 2169409912320 |
| 15 | 4613203125000 |
| 16 | 9345848836096 |
| 17 | 18143945104041 |
[0,1,1536,118098,2621440,29296875,211631616, 1129900996,4831838208,17433922005,55000000000, 155624547606,402462867456,965009442943, 2169409912320,4613203125000,9345848836096, 18143945104041] |