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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 86 |
| 3 | 3750 |
| 4 | 109672 |
| 5 | 2419462 |
| 6 | 43021728 |
| 7 | 643548464 |
| 8 | 8343640624 |
| 9 | 95835049605 |
| 10 | 991606081332 |
| 11 | 9364586280842 |
| 12 | 81571540591968 |
| 13 | 661034448807902 |
| 14 | 5019357866562208 |
| 15 | 35927279225314344 |
| 16 | 243657157464337888 |
| 17 | 1572638456431119570 |
| 18 | 9696997279843999470 |
| 19 | 57313953586222481126 |
| 20 | 325672739267123628976 |
[1,86,3750,109672,2419462,43021728,643548464, 8343640624,95835049605,991606081332,9364586280842, 81571540591968,661034448807902,5019357866562208, 35927279225314344,243657157464337888, 1572638456431119570,9696997279843999470, 57313953586222481126,325672739267123628976] |