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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 9 |
| 2 | 525 |
| 3 | 44067 |
| 4 | 4338765 |
| 5 | 467396050 |
| 6 | 53346810991 |
| 7 | 6339179481480 |
| 8 | 775994115988525 |
| 9 | 97182642466115275 |
| 10 | 12392633418043399130 |
| 11 | 1603634650155295053250 |
| 12 | 210047857493659698690575 |
| 13 | 27795006677556725604853840 |
| 14 | 3710220786174094422360657000 |
| 15 | 498998879378383167317202612400 |
[1,9,525,44067,4338765,467396050,53346810991, 6339179481480,775994115988525,97182642466115275, 12392633418043399130,1603634650155295053250, 210047857493659698690575, 27795006677556725604853840, 3710220786174094422360657000, 498998879378383167317202612400] |