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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 2874 |
| 4 | 84086160 |
| 5 | 77920099694640 |
| 6 | 1787320731699689472000 |
| 7 | 1208369393947533515948886636000 |
| 8 | 22022604563875220592723146462014970246400 |
| 9 | 10631042739086498005729294276105510004209560426195000 |
| 10 | 136864426940639977623403211038729959780835360788855628470904385280 |
[1,1,1,2874,84086160,77920099694640, 1787320731699689472000, 1208369393947533515948886636000, 22022604563875220592723146462014970246400, 10631042739086498005729294276105510004209560426195\ 000, 13686442694063997762340321103872995978083536078885\ 5628470904385280] |