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| n | a(n) |
|---|---|
| 1 | 20 |
| 2 | 488 |
| 3 | 24236 |
| 4 | 1726412 |
| 5 | 109114568 |
| 6 | 7424366648 |
| 7 | 545678596592 |
| 8 | 41205774636932 |
| 9 | 3234489739234676 |
| 10 | 260643410442091112 |
| 11 | 21446976192435396140 |
| 12 | 1795640886305783918948 |
| 13 | 152542601906447626814216 |
| 14 | 13119246582832293524505360 |
[20,488,24236,1726412,109114568,7424366648, 545678596592,41205774636932,3234489739234676, 260643410442091112,21446976192435396140, 1795640886305783918948,152542601906447626814216, 13119246582832293524505360] |