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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 33 |
| 3 | 1161 |
| 4 | 140545 |
| 5 | 63148833 |
| 6 | 111254837505 |
| 7 | 793938286762113 |
| 8 | 23282575640347295745 |
| 9 | 2812444483776375381074433 |
| 10 | 1393909730376211388561041231873 |
[1,3,33,1161,140545,63148833,111254837505, 793938286762113,23282575640347295745, 2812444483776375381074433, 1393909730376211388561041231873] |