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| n | a(n) |
|---|---|
| 1 | 90 |
| 2 | 2370 |
| 3 | 57232 |
| 4 | 1318221 |
| 5 | 29356228 |
| 6 | 639141361 |
| 7 | 13698519779 |
| 8 | 290324839303 |
| 9 | 6103041497311 |
| 10 | 127519984428456 |
| 11 | 2652384495217319 |
| 12 | 54979384455905446 |
| 13 | 1136640525774010786 |
| 14 | 23451581988184791928 |
| 15 | 483112213807378047958 |
[90,2370,57232,1318221,29356228,639141361, 13698519779,290324839303,6103041497311, 127519984428456,2652384495217319, 54979384455905446,1136640525774010786, 23451581988184791928,483112213807378047958] |