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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 8 |
| 3 | 32 |
| 4 | 373 |
| 5 | 4647 |
| 6 | 91028 |
| 7 | 2074059 |
| 8 | 51107344 |
| 9 | 1245930065 |
| 10 | 28900653074 |
| 11 | 625715497344 |
| 12 | 12562875567065 |
| 13 | 233750783834504 |
| 14 | 4038807303045625 |
| 15 | 65003434860142353 |
| 16 | 977872935273906860 |
| 17 | 13795944871933252078 |
[1,1,8,32,373,4647,91028,2074059,51107344, 1245930065,28900653074,625715497344, 12562875567065,233750783834504,4038807303045625, 65003434860142353,977872935273906860, 13795944871933252078] |