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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 65 |
| 3 | 1180 |
| 4 | 14737 |
| 5 | 193116 |
| 6 | 2633596 |
| 7 | 35794147 |
| 8 | 484744488 |
| 9 | 6565497170 |
| 10 | 88948580449 |
| 11 | 1205066512034 |
| 12 | 16325845207244 |
| 13 | 221177055650826 |
| 14 | 2996434981248536 |
| 15 | 40594730646344051 |
| 16 | 549964241638455480 |
[1,65,1180,14737,193116,2633596,35794147, 484744488,6565497170,88948580449,1205066512034, 16325845207244,221177055650826,2996434981248536, 40594730646344051,549964241638455480] |