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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 8 |
| 3 | 92 |
| 4 | 1289 |
| 5 | 20518 |
| 6 | 358611 |
| 7 | 6749268 |
| 8 | 135095116 |
| 9 | 2851394415 |
| 10 | 63066764910 |
| 11 | 1454808403309 |
| 12 | 34869538474423 |
| 13 | 865771965143262 |
| 14 | 22211885496614803 |
| 15 | 587583912259110350 |
| 16 | 15998031596388750905 |
| 17 | 447598845624472993496 |
| 18 | 12850922242548662924046 |
| 19 | 378153449033278630907275 |
[1,1,8,92,1289,20518,358611,6749268,135095116, 2851394415,63066764910,1454808403309, 34869538474423,865771965143262,22211885496614803, 587583912259110350,15998031596388750905, 447598845624472993496,12850922242548662924046, 378153449033278630907275] |