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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 5 |
| 3 | 70 |
| 4 | 1973 |
| 5 | 94216 |
| 6 | 6851197 |
| 7 | 706335064 |
| 8 | 98105431657 |
| 9 | 17669939141440 |
| 10 | 4006704580744601 |
| 11 | 1117139031649249984 |
| 12 | 375701872315954792093 |
| 13 | 149988716080978525265776 |
| 14 | 70129434038848683974552365 |
[1,1,5,70,1973,94216,6851197,706335064, 98105431657,17669939141440,4006704580744601, 1117139031649249984,375701872315954792093, 149988716080978525265776, 70129434038848683974552365] |