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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 5 |
| 2 | 35 |
| 3 | 530 |
| 4 | 15645 |
| 5 | 673100 |
| 6 | 37951975 |
| 7 | 2668045700 |
| 8 | 225591547225 |
| 9 | 22347122264900 |
| 10 | 2543582111665875 |
| 11 | 327736278022956500 |
| 12 | 47245927138947731125 |
| 13 | 7548695252947520166500 |
| 14 | 1326483608786914301185375 |
| 15 | 254733442821907695977652500 |
| 16 | 53175506363950820566794680625 |
| 17 | 12012490474019349963485905242500 |
[1,5,35,530,15645,673100,37951975,2668045700, 225591547225,22347122264900,2543582111665875, 327736278022956500,47245927138947731125, 7548695252947520166500,1326483608786914301185375, 254733442821907695977652500, 53175506363950820566794680625, 12012490474019349963485905242500] |