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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 10 |
| 3 | 136 |
| 4 | 406 |
| 5 | 111628 |
| 6 | 400960 |
| 7 | 624403 |
| 8 | 40423536 |
| 9 | 1119043156276 |
| 10 | 4291092052416 |
| 11 | 600441627703203 |
| 12 | 93344240136333376 |
| 13 | 4950849307261614030 |
| 14 | 9159508712581260256 |
| 15 | 91853946457361410960 |
| 16 | 94418158421136440556 |
| 17 | 108128255436355107240 |
| 18 | 111546878242671354528 |
[1,10,136,406,111628,400960,624403,40423536, 1119043156276,4291092052416,600441627703203, 93344240136333376,4950849307261614030, 9159508712581260256,91853946457361410960, 94418158421136440556,108128255436355107240, 111546878242671354528] |