n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 6 |
3 | 42 |
4 | 315 |
5 | 2541 |
6 | 21931 |
7 | 201761 |
8 | 1971627 |
9 | 20401115 |
10 | 222886237 |
11 | 2564378397 |
12 | 30996823039 |
13 | 392772620555 |
14 | 5206946927601 |
15 | 72084153595073 |
16 | 1040323636265431 |
17 | 15627180533214417 |
18 | 243970019981427565 |
19 | 3953119943277152705 |
20 | 66394925299770846495 |
21 | 1154518082416143179150 |
[1,1,6,42,315,2541,21931,201761,1971627,20401115, 222886237,2564378397,30996823039,392772620555, 5206946927601,72084153595073,1040323636265431, 15627180533214417,243970019981427565, 3953119943277152705,66394925299770846495, 1154518082416143179150] |