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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 33 |
| 3 | 1251 |
| 4 | 173505 |
| 5 | 94216515 |
| 6 | 210576669921 |
| 7 | 2002383115518243 |
| 8 | 82856383278525698433 |
| 9 | 15166287556997012904054915 |
| 10 | 12437232461209961704387810340769 |
[1,3,33,1251,173505,94216515,210576669921, 2002383115518243,82856383278525698433, 15166287556997012904054915, 12437232461209961704387810340769] |